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False PositivesWhat is a false positive? It is a test result that is returned when a substance tests positive for another compound. It is a case of mistaken identity. For example if you eat a couple poppy seed cakes before testing, you can get a positive result for opiates.The chances of you getting a false positive depends on the quality of the laboratory that does the testing. There seems to be about 1,200 of these labs in the United States currently testing for drugs. Less than a 100 of these meet federal standards and most of the individual states do not regulate drug test labs. The number of false positives returned range from 4% to over 50%, depending on the lab. A concern here is that, if your company tests for drug usage, they are probably not required to use a certified drug testing lab, which means you have a greater chance of getting a false positive. The list below shows hundreds of products that AskDocWeb has been able to document as causes of a false positive drug test result. Substances that may cause a false positiveA4Way Nasal Spray  false positive for Amphetamines, Morphine (Reference: 1)Accutrim (PHENYLPROPANOLAMINE  Dexatrim)  false positive for Ecstasy (MDMA), Meth (References: 11, 16, 18) Acetaminoph w/codeine  false positive for Morphine (Reference: 1) AcetAM (Theophylline Calcium Glycinate)  false positive for Amphetamines, Heroin, Opiates (Reference: 1) AcroLase Plus® contains barbiturates (Reference: 18) Adam (slang)  may test positive for methamphetamine and ecstasy (References: 33 and 52) Afrinol (Pseudoephedrine)  may test positive for amphetamines (Reference: 33) A.P.C. w/codeine  false positive for Morphine (Reference: 1) A.R.M.  false positive for Amphetamines (References: 3 and 18) Aciphex (rabeprazole sodium)  PPIs may test positive for THC (Reference: 37) Actifed (pseudoephedrine and triprolidine)  false positive for Amphetamines (References: 3 and 18) Actifed with Codeine Cough Syrup®  (Reference: 18) Adderall  contains amphetamine, positive for Meth (References: Physician's Desk Reference (PDR), 18, and 52) Advil (Ibuprofen)  false positive for THC, Marijuana (References: 1, 14, 16, 18, 20, 26, and 29) Afrin (Oxymetazoline Nasal Spray)  false positive for Ecstasy (MDMA), Meth (References: 3, 11, 16, and 18) Aleve (Naproxen)  false positive for THC, Marijuana (References: 3, 16, and 18) AlkaSeltzer Plus  false positive for Amphetamines, Morphine (Reference: 1) Allerest  false positive for Amphetamines, Ecstasy, Meth and Morphine (References: 1, 3, 11, 16, and 18) Allobarbital  may test positive for Barbiturates (References: 33 and 52) Alphenol  may test positive for Barbiturates (References: 33 and 52) Alprazolam  contains benzodiazepines (References: 18, 33, and 52) Amantadine  may test false positive for amphetamines (References: 32 and 36 and 57) Ambenyl  contains codeine (Reference: 18) Amesec  false positive for Amphetamines, Heroin, Opiates (Reference: 1) Amfepramone  false positive for Amphetamines, Ecstasy (MDMA), Meth (References: 3, 11, and 16) Amifepramone  false positive for Amphetamines and Ecstasy (References: 3 and 11) Amineptine  false positive for Amphetamines and Ecstasy (References: 3, 11, and 18) Amitriptyline (including the trade names Elavil, Lentizol, Tryptizol, Triptafen, TriptafenM)  false positive for LSD (References: 3 and 47) Amitriptyline  may test positive for Tricyclic Antidepressants (TCA) (References: 33 and 52) Amobarbital  may test positive for barbiturates (References: 33 and 52) Amogel PG®  contains opium/morphine (Reference: 18) Amoxicillin  false positive for cocaine (References: 13, 16, 18, 20, 21, 26, and 29) Ampicillin  false positive for cocaine (Reference: 29) Amisulpride  may show false positive for opioids (Reference: 58) Amphetaminil  metabolizes to amphetamine (Reference: 18) Ampicin  may cause false positive for opiates (Reference: 20) Amytal  Positive for Barbiturates (Reference: 52) Anaprox  false positive for THC, Marijuana (References: 1, 3, and 18) Ansaid  false positive for marijuana (Reference: 3) Anti Anxiety medication, most  false positive for benzodiazepines (Reference: 3) Anti Inflammatories  such as Naproxyn (Reference: 26) Antiasthmatics that contain phenobarbitol  false positive for barbiturates (Reference: 3) Antihistamines in general  false positives for Methadone (Reference: 43) Antibiotics  false positives for Heroin, Cocaine (References: 13, 18, and 20) Antrocol Elixor®  contains barbiturates (Reference: 18) Anxitol  may test positive for Benzodiazepines (References: 33 and 52) ApoNaproxen  false positive for THC, Marijuana (Reference: 1) Aprobarbital  may test positive for barbiturates (References: 33 and 52) Artane  false positive for LSD (Reference: 3) Ascriptin w/codeine  false positive for Morphine (Reference: 1) Aspirin with Codeine  (Reference: 18) Asthma medications  false positives for Amphetamines and Ecstasy (References: 20 and 21) Astramoprh PF®  contains morphine (Reference: 18) Ativan® (lorazepam)  contains benzodiazepines (References: 18 and 52) Atripla (Efavirenz)  false positive for cannabinoid THC (Reference: 39) Avelox (Fluoroquinolone)  false positive for opiates (Reference: 28) BB2 vitamin  false positive for THC (Reference: 21)Bactrim  may test positive for benzodiazepines (Reference: 60) Barbital  may test positive for barbiturates (References: 33 and 52) Bayer Select Maximum Strength Sinus Pain Relief Caplets  false positive for Amphetamines (References: 3 and 18) Bayer Select Pain Relief Formula  false positive for THC, Marijuana (References: 3 and 18) Benadryl (Diphenhydramine)  false positives for benzodiazepines, PCP, tricyclic antidepressants (Reference: 45) Benadryl (Diphenhydramine)  false positives for PCP (Reference: 24, 62 and 65) Bentyl®  false positive for LSD, Methadone (References: 3, 18, and 43) Benylin  false positive for Opioids (Reference: 3) Benzatropine/Artane®  (Reference: 18) Benzedrine®  Amphetamines (Reference: 18) Benzphetamine  false positives for Amphetamines, Ecstasy, and LSD (References: 3, 11, 18, and 47) Biphetamine®  for Amphetamines (Reference: 18) Black Pearls (Tung Sheuh pills)  contain benzodiazepines (Reference: 32) Briantum  may test positive for benzodiazepines (References: 33, and 52) Bromazepam (including the trade names Lexotan)  may test positive for benzodiazepines (References: 33 and 52) Bromocriptine/Parlodel®  (Reference: 18) Bromocription  false positive for LSD (Reference: 3) Bromphenlramlne  falsePositive for Amphetamine (Reference: 22) Broncholate CS  contains codeine (Reference: 18) Bronkaid  false positive for Amphetamines, Heroin, Opiates, Ecstasy, Meth (References: 1, 3, 16, and 18) Bronkotabs  false positive for Amphetamines, Heroin, Opiates (References: 1 and 11) Buprenex®  contains synthetic opiates (Reference: 18) Buprenorphine  contains synthetic opiates (Reference: 18) bupivacaine  may test false positive for cocaine (Reference: 59) Bupropion (Wellbutrin, Zyban)  false positive for Amphetamines (References: 12, 31, 32, 36, 57, 66, and 68) Bupropion  may test false positive for MDMA (3,4methylenedioxymethamphetamine ) (Reference: 67) Bupropion  may test false positive for amphetamine and MDMA (Reference: 62) Buproprion  false positive for LSD (Reference: 47) Buspirone  false positive for LSD (Reference: 47) Butabarbital (including the trade names Butisol and Soneryl)  may test positive for Barbiturates (References: 33, and 52) Butalbital (including the trade names Fioricet and Fiorinal)  may test positive for Barbiturates (Reference: 33, 52) Butisol  may test positive for Barbiturates (References: 33, and 52) CCafergot®  false positive for LSD (References: 3, and 18)Caldecon  false positive for Amphetamines, Morphine (Reference: 1) Capital and Codeine Oral Solution  false positive for Opioids (References: 3, and 18) Captagon®  metabolizes to amphetamine (Reference: 18) Carbamazepine  false positive for Tricyclic Antidepressants (TCA) (Reference: 46) Other brand names of Carbamazepine include Biston, Calepsin, Carbatrol, Equetro, Finlepsin, Sirtal, Stazepine, Telesmin, Tegretol, EPITAB XR(Pakistan) Teril, Timonil, Trimonil, Epimaz, Carbama/Carbamaze (New Zealand), Amizepin (Poland), Carzine (Kolkata), Mazetol, Tegrital, Tegrita (India), Karbapin (Serbia), Hermolepsin (Sweden), Degranol (South Africa), and Tegretal (Chile, Germany). Cathne  false positives for Amphetamines, Meth and Ecstasy (MDMA) (References: 3, 11, and 16) Centrax  may test positive for benzodiazepines (References: 33 and 52) Cephradine  false positive for LSD (Reference: 47) Cheracol  contains codeine (Reference: 18) Cheracol Sinus  false positive for Amphetamines (Reference: 3) Chinese herb pills  contain benzodiazepines (Reference: 32) Chloroquine (Aralen®)  may test false positive for amphetamines (Reference: 36 and 57) Chiorpromazlne  FalsePositive for Amphetamine (References: 22 and 26) Chlorazepate  Positive for Benzodiazepines (Reference: 52) Chlordiazepoxide (Librium)  contains benzodiazepines (Reference: 18) Chlordiazepoxide  may test positive for Benzodiazepines (References: 33 and 52) Chlorpromazine (Thorazine)  false positive for Opiates (Also false for pregnancy) (References: 32, and 36) Chlorpromazine (Thorazine)  may test false positive for PCP (lphencyclohexylpiperidine, Phencyclidine) 33) Chlorpromazine  false positive for phenylketonuria, amylase, uroporphyrins, urobilinogen. May also cause false positive pregnancy test. (Reference: 23) Chlorpromazine  false positive for phencyclidine (Reference: 32) Chlorpromazine  false positive for Tricyclic Antidepressants (TCA) and LSD (References: 46, and 47) Chlorpromazine (Thorazine®)  may test false positive for amphetamines (References: 57) Cipro (Fluoroquinolone antibiotic)  false positives for opiates (References: 25, 28, and 32) Cipro XR (Fluoroquinolone)  false positive for opiates (Reference: 28) Clinafloxacin  (Reference: 25) Ciprofloxacin extendedrelease (Fluoroquinolone)  false positive for opiates (Reference: 28) Ciprofloxacin (Fluoroquinolone)  false positive for opiates (Reference: 28) Clinoril  false positive for THC, Marijuana (References: 3 and 18) Clobazam (Frisium)  may test positive for Benzodiazepines (References: 33 and 52) Clobenzorex  false positives for Amphetamines and Ecstasy (References: 3, 11, and 18) Clonazepam  is a benzodiazepine (Reference: 18) Clonazepam  may test positive for Benzodiazepines (Reference: 33, 52) Clonopin  may test positive for Benzodiazepines (References: 33 and 52) Clorazepate  may test positive for Benzodiazepines (Reference: 33) Coca tea, Coca leaf, Coca flour, Coca oil  positive for cocaine (References: 41 and 42) Cocodamol  positive for opiates (References: 33 and 52) Codafen  positive for opiates (References: 33 and 52) Codafen  may test positive for opiates (Reference: 33) Codafen Continus  Positive for Opiates (Reference: 52) Codeine  false positives for Amphetamines (Reference: 14 and 57) Codeine  will test positive (not false) for opiates (Reference: 20) Codeine Linctus  tests positive for opiates (References: 33 and 52) Codeine Phosphate (Codafen Continus, Codeine Linctus, Pediatric BP, Galcodine, Kapake, Migraleve, Solpadol, Tylex)  tests positive for opiates (References: 33 and 52) Codinal PH®  contains codeine (Reference: 18) Codydramol  positive for opiates (References: 33 and 52) CoffeeBreak  false positive for Morphine (Reference: 1) This product is no longer available in the USA or Canada. Cold remedies with dextromethorphan  positive for opiates (heroin) (Reference: 21) Comtrex  false positive for Opioids (Reference: 3) Contac  false positive for Amphetamines, Morphine (References: 1 and 20) Contac Severe Cold Formula  false positive for Morphine (Reference: 43) Contact  false positives for Amphetamines, Meth and Ecstasy (References: 3, 11, 16, and 18) Contact NonDrowsy Formula Sinus Caplets  false positive for Amphetamines (References: 3 and 18) Control  false positive for Morphine (References: 1) Coproximal  may test positive for Propoxyphene (PPX) (Reference: 33) Coproximal  Positive for Propoxyphene (Reference: 52) Cough medicines  See if any ingredients are on this list (Reference: 20) Cough suppressants with Dextromethorphan (DXM)  false positive for Heroin (MDMA) (Reference: 16) Cows head pills (Chinese herb)  contain benzodiazepines (Reference: 32) Cramp End Tablets  false positive for THC, Marijuana (References: 3 and 18) Cremacoat 4  false positive for Morphine (Reference: 43) Cyclimorph  positive for opiates (Reference: 33) Cyclobenzaprine  false positive for Tricyclic Antidepressants (TCA) (Reference: 46) Cylert  false positives for Amphetamines and Ecstasy (References: 3 and 11) Cyproheptadine  false positive for Tricyclic Antidepressants (TCA) (Reference: 46) DDalmane®  contains benzodiazepines (Reference: 18)Darvocet  may test positive for Propoxyphene (PPX) (References: 33 and 52) Darvon  may test positive for Propoxyphene (PPX) (Reference: 33) Darvon®  contains synthetic opiates (Reference: 18) Darvon  Positive for Propoxyphene (Reference: 52) Datril  false positives for Marijuana (Reference: 1) Daypro  false positives for benzodiazepines (Reference: 34) Deconsal  contains codeine (Reference: 18) Delorazepam (Briantum)  may test positive for benzodiazepines (References: 33 and 52) Demerol  tests positive for opiates (References: 26 and 29) Demetrin  may test positive for benzodiazepines (References: 33 and 52) Deprenyl  false positives for Amphetamines and Ecstasy (References: 3, 11, and 18) Desipramine  false positives for LSD (References: 32, 36, and 47) Desipramine (Norpramine®)  may test false positive for amphetamines (References: 57) Desoxyephedrine  false positive for Amphetamines and Ecstasy (References: 3, 11, and 18) Desoxyn  may test positive for methamphetamine (Reference: 33) Desoyn®  contains dmethamphetamine (Reference: 18) Dexamphetamine Sulphate  Positive for Amphetamine (Reference: 52) Dexatrim  false positive for Ecstasy (MDMA), Meth (References: 3, 11, 16, and 18) Dexdenfluramine  false positive for Amphetamines and Ecstasy (References: 3, and 11) Dexedrine  is an Amphetamine (References: 3, 11, and 18) Dexedrine  may test positive for amphetamines (References: 33 and 52) Dexfenfluramine  false positive for Amphetamines (References: 3) and 11) Dexlansoprazole  PPIs may test positive for THC (Reference: 37) Dextroamphetamine  false positive for Amphetamines (Reference: 3 and 57) Dextroamphetamine  may test positive for amphetamines (Reference: 33) Dextromethorphan (DXM)  false positive for Heroin, Opiates, Morphine (References: 1, 3, 16, 21, 26, 29, and 32) Dextromethorphan  may test false positive for PCP (References: 33) Dextromethorphan hydrobromide or DXM  false positives for amphetamines (Reference: 11) Dextropropoxyphene  may test positive for Propoxyphene (PPX) (References: 33, and 52) DHC  may test positive for opiates (Reference: 33) DHC Continus  Positive for Opiates (Reference: 52) DHEA  false positive for anabolic steroid use (Reference: 13) Diabetes  false positives for Amphetamines, Cocaine, THC, Ecstasy, Meth and Opiates (References: 3, 16, 20, and 21) Diabismul®  contains opium/morphine (Reference: 18) Diazemuls  may test positive for Benzodiazepines (Reference: 33) Diazepam (Diazemuls, Stesolid, Valclair, Valium)  false positive for PCP (Reference: 29) Diazepam (generic name for Valium)  contains benzodiazepines (Reference: 18, 20, 26) Diazepam Diazemuls  Positive for Benzodiazepines (Reference: 52) Diazepam  may test positive for Benzodiazepines (References: 33 and 52) Dicyclomine  (Reference: 18) Didrex  false positive for Amphetamines (Reference: 3, 11) Didrex  metabolizes to methamphetamine and amphetamine (Reference: 18) Diet aids with phenylpropanolamine (Dexatrim, Accutrim)  false positive for amphetamines (References: 10, 11, 16, and 18) Dietac  false positive for Morphine (Reference: 1) Dihydrocodeine (DHC Continus, Paramol, Remedeine, Remedeine Forte)  may test positive for opiates (Reference: 33, 52) Dihyrocodeine  contains synthetic opiates (Reference: 18) Dilantin  false positives for Barbiturates (References: 3 and 20) Dilaudid  may test positive for opiates (References: 33 and 52) Dilaudid®  contains synthetic opiates (Reference: 18) Diltiazem  false positive for LSD (Reference: 47) DimetaneDC Cough Syrup ®  contains codeine (Reference: 18) Dimetapp  false positive for Amphetamines (Reference: 3) Dimetapp  false positive for Morphine, Meth, Ecstasy (References: 1, 11, 16, and 18) Note: Dimetapp is a brand name of the generic drug loratadine, which is also sold under the brand names Claritin, Alavert, Claritin Reditab, Claritin Hives Relief, ClearAtadine, ClearAtadine Children's, Loratadine Reditab, Ohm Allergy Relief, Tavist ND, Walitin, and Dimetapp ND. Dimethylamphetamine  metabolizes to methamphetamine and amphetamine (Reference: 18) Dimethylamylamine  false positive for amphetamines (Reference: 50) Dinintel®  metabolizes to amphetamine (Reference: 18) Diocalm  may test positive for opiates (References: 33 and 52) Diphenhydramine  false positive for phencyclidine (Reference: 32) Diphenhydramine  false positive for Tricyclic Antidepressants (TCA) (Reference: 46) Diphenhydramine (Benadryl)  false positive PCP results (Reference: 24) DMAA (dimethylamylamine)  false positive for amphetamines (Reference: 50) dMethamphetamine  HCL may test positive for methamphetamine (Reference: 33) Doco children's cough syrup  false positive for Opioids (Reference: 3) Dolobid  false positive for THC, Marijuana (References: 3 and 18) Dolophine  may test positive for methadone (References: 33 and 52) Dolophine®  contains synthetic opiates (Reference: 18) DonnagelPG ®  contains opium/morphine (Reference: 18) Donnatal  may test positive for barbiturates (References: 33 and 52) Donnatal®  contains barbiturates (Reference: 18) Donnatol (for irritable bowel syndrome)  false positive for barbiturates (Reference: 3) Dormonocet®  contains benzodiazepines (Reference: 18) Doxepin  false positive for LSD (References: 36 and 47) Doxepin  may test positive for Tricyclic Antidepressants (References: 33 and 52) Doxylamine  false positive for phencyclidine, PCP, angel dust (Reference: 32) Dristan Cold caplets  false positive for Amphetamines (Reference: 3) Dristan Cough Formula  false positive for Heroin, Opiates, Morphine (References: 1 and 18) Dristan Nasal Spray  false positive for Amphetamines (References: 26 and 29) Drixoral Cold and Flu  false positive for Amphetamines (References: 3 and 18) Dronabad®  (Reference: 18) Dronabinol (Marinol)  shows positives for THC, marijuana (References: 16 and 18) Duramorph  positive for opiates (Reference: 33) Duramorph®  contains morphine (Reference: 18) Durophet®  Amphetamines (Reference: 18) EE (slang)  may test positive for methamphetamine and ecstasy (References: 33 and 52)Ecstasy (slang)  may test positive for methamphetamine and ecstasy (References: 33 and 52) Edecrin  false positive for THC, Marijuana (References: 3 and 18) Efavirenz  false positive for THC, Marijuana (References: 32, 39, and 52) Efavirenz (Sustiva®)  may test positive for THC (Reference: 33, 57, and 60) Effexor Tablets (venlafaxine hydrochloride)  false positive for PCP (Reference: 52) Effexor XL  Potential Positive for PCP (Reference: 52) Efidac/24  false positive for Amphetamines (References: 3 and 18) Efotamine  false positive for LSD (Reference: 3) Elavil  false positives for opiates for up to three days, LSD, Methadone (Referencess: 3, 26, 29, and 43) Elavil  Positive for Tricyclic Antidepressants (Reference: 52) Eldepryl  false positive for Amphetamines and Ecstasy (References: 3 and 11) Elderpryl®  metabolizes to methamphetamine and amphetamine (Reference: 18) Empirin w/codeine  false positive for Morphine, Opioids (References: 1, 3, and 20) Emprin with Codeine®  (Reference: 18) Enoxacin  falsepositive for opiates (References: 25 and 28) Entersan  may test positive for opiates (References: 33 and 52) Ephedra  false positives for Amphetamines and Ecstasy (References: 20, 22, and 36) Ephedrine  false positive for Amphetamines, Meth, and Ecstasy (References: 3, 11, 16, 18, 29, 32 and 57) Ephedrinebased compounds  false positives for Amphetamines and Ecstasy (References: 20, 22, and 36) Ephedrol, Ephedra (Ma Haung)  false positive for Amphetamines, Heroin, Opiates (Reference: 1) Ergostat®  false positive for LSD (References: 3 and 18) Ergotamine  (Reference: 18) Esomeprazole  PPIs may test positive for THC (Reference: 37) Estasule Minus  false positive for Amphetamines, Heroin, Opiates (Reference: 1) Estazolam  may test positive for Benzodiazepines (References: 33 and 52) Etafediabe  false positive for Amphetamines, Meth and Ecstasy (References: 3, 11, and 16) Ethylamphetamine  metabolizes to amphetamine (Reference: 18) Ethylmorphine  may test positive for opiates (References: 33 and 52) Eve (slang)  may test positive for amphetamines (References: 33 and 52) Excedrin IB  false positives for Marijuana (Cannabis) THC (References: 3, 16, and 18) FFactive (Fluoroquinolone)  false positive for opiates (Reference: 28)Famprofazone  false positive for Amphetamines and Ecstasy (References: 3, 11, and 18) Feldene  false positives for THC (References: 3 and 18) Fencamine  metabolizes to methamphetamine and amphetamine (Reference: 18) Fenelylline  false positive for Amphetamines and Ecstasy (References: 3, 11, and 18) Fenfluramine  false positive for Ecstasy (References: 3 and 11) Fenfluramine (Fen Phen)  may test false positive for amphetamines (References: 57) Fenoprofin  false positive for Marijuana, Amphetamines, Barbiturates (Reference: 1) Fenproporex  metabolizes to amphetamine (Reference: 18) Fenproyorex  false positive for Amphetamines and Ecstasy (References: 3 and 11) Fentanyl  false positive for LSD (Reference: 47) Finedal®  metabolizes to amphetamine (Reference: 18) Fioricet  may test positive for Barbiturates (References: 33 and 52) Fioricet with Codeine®  (Reference: 18) Fiorinal  may test positive for Barbiturates (References: 33 and 52) Fiorinal known to produce a false positive for phenobarbital (Reference: 61) Fiorinal w/codeine  false positive for Morphine (References: 1, 3, 18, and 20) Floxin (Fluoroquinolone)  false positive for opiates (Reference: 28) Flunitrazepam  may test positive for Benzodiazepines (Reference: 33, 52) Fluoroquinolone antibiotics  false positive for opiates (References: 28 and 32) Fluoxetine (Prozac)  false positives for amphetamines and LSD (References: 31 and 47) Flurazepam  contains benzodiazepines (Reference: 18) Flurbiprofen  false positive for marijuana (Reference: 3) Fluriprofen®  (Reference: 18) Fluroquinolones (Levaquin®)  may test false positive for opiates (References: 57) Fluspirilene  may test positive for amphetamines (Reference: 26) Frisium  may test positive for Benzodiazepines (References: 33 and 52) Furfenorex  metabolizes to methamphetamine and amphetamine (Reference: 18) GGalcodine  may test positive for opiates (References: 33 and 52)Galenphol  may test positive for opiates (References: 33 and 52) Gamanil  may test positive for Tricyclic Antidepressants (References: 33 and 52) Gatifloxacin  (Reference: 25) Gemifloxacin (Fluoroquinolone)  false positive for opiates (Reference: 28) Genpril  false positive for THC, Marijuana (References: 3 and 18) Gradumet®  contains dmethamphetamine (Reference: 18) HHalcion  Positive for Benzodiazepines (Reference: 52)Haloperidol  false positive for LSD (Reference: 47) Haltran  false positive for THC, Marijuana (References: 3 and 18) Hamantashen  may test positive for opiates. (Reference: 13) Hempseed Oil (Cannabis Seed/Hemp Oil)  false positive for THC (References: 3, 16, 21, 29, and 57) Hold Cough Suppressant  false positive for Heroin, Opiates, Morphine (Reference: 1) Homatropine Methylbromide  contains synthetic opiates (Reference: 18) Hycodan®  contains synthetic opiates (Reference: 18) Hydergine  false positive for LSD (Reference: 3) Hydrocodone  false positive for oxycodone (Reference: 41 and 57) Hydrocodone Bitartrate  contains synthetic opiates (Reference: 18) Hydrocodone  contains synthetic opiates (Reference: 18) Hydrocodone  may test positive for opiates (References: 33 and 52) Hydromorphone (Dilaudid®)  contains synthetic opiates (Reference: 18) Hydromorphone  may test positive for opiates (References: 33 and 52) Hydromorphone (Dilaudid®)  may test false positive for oxycodone (References: 57) Hydrostat  may test positive for opiates (References: 33 and 52) Hydroymethamphetamone  false positive for Amphetamines (Reference: 3) IIbuprin  false positive for marijuana (Reference: 3)Ibuprofen  false positive for Marijuana (THC) (References: 1, 3, 16, 18, 29, and 48) Ifenoprofen  false positive for THC, Marijuana (References: 3, 13, 18, 21, and 26) Imitrex Hydergine®  may test false positive for LSD (Reference: 3, 18) Indocin  false positive for THC, Marijuana (Reference: 3 Indocin  could affect urine drug test results (Reference: 18) Infantol Pink ®  contains opium/morphine (Reference: 18) Infumorf  contains morphine (Reference: 18) Isoclor Expectorant  contains codeine (Reference: 18) JJoy detergent (now that's weird)  false positives (Reference: 36)KKaoden with Codeine®  (Reference: 18)Kaodene with Paregoric®  contains opium/morphine (Reference: 18) Kapake  may test positive for opiates (References: 33 and 52) Kenesed®  contains barbiturates (Reference: 18) Kapidex  PPIs may test positive for THC (Reference: 37) Ketamine  false positive for PCP (References: 16 and 32) Ketoprofen  false positive for THC (References: 3, 16, and 18) Kidney disease  false positive for Cocaine (References: 3, 16, and 20) Kidney infection  false positive for Amphetamines, THC, Ecstasy, and Opiates (References: 3, 16, and 21) Klonopin  may test positive for Benzodiazepines (References: 33 and 52) Klonopin®  contains benzodiazepines (Reference: 18) Koalin and Morphine Mixture  may test positive for opiates (References: 33 and 52) LLabetolol  false positive for LSD (References: 36 and 47)Lansoprazole  PPIs may test positive for THC (Reference: 37) Lerisum  may test positive for Benzodiazepines (Reference: 33) Ketipinor (quetiapine)  falsepositives for amphetamines (Reference: 48) Labetalol (Labetalol)  may test false positive for amphetamines (References: 57) Lamotrigine (Lamictal®)  false positive for PCP (Reference: 53) Lentizol  Positive for Tricyclic Antidepressants (Reference: 52) Lerisum  Positive for Benzodiazepines (Reference: 52) Levaquin® (Fluoroquinolone)  false positive for opiates (Reference: 28) Levofloxacin (Fluoroquinolone antibiotic)  false positives for opiates (References: 25, 28, and 57) Lexotan  may test positive for benzodiazepines (References: 33 and 52) Libritab®  contains benzodiazepines (Reference: 18) Librium  may test positive for Benzodiazepines (References: 33 and 52) Librium®  contains benzodiazepines (Reference: 18) Limbitrol®  contains benzodiazepines (Reference: 18) Lisuride  false positive for LSD (Reference: 3) Lisuride/Dopergin®  (Reference: 18) Liver Disease  false positive for Opiates, Ecstasy, THC and Amphetamines (References: 3, 16, 20, and 21) lMethamphetamine HCL  may test positive for methamphetamine (Reference: 33) Lodine  false positive for THC, Marijuana (References: 3, 18, and 20) Lofepramine  may test positive for Tricyclic Antidepressants (References: 33 and 52) Lomefloxacin  (Reference: 25) Lomont  may test positive for Tricyclic Antidepressants (References: 33 and 52) Loprazolam  contains benzodiazepines (Reference: 18) Loratab  may test positive for opiates (References: 33 and 52) loratadine (Dimetapp)  false positive for Amphetamines (Reference: 3) Lorazepam  contains benzodiazepines (Reference: 18) Lorazepam  may test positive for Benzodiazepines (References: 33 and 52) Lorcet  may test positive for opiates (References: 33 and 52) Lormetazepam  may test positive for Benzodiazepines (References: 33 and 52) Lortab  an opioid analgesic (References: Physician's Desk Reference (PDR)) Love Drug (slang)  may test positive for amphetamines (References: 33 and 52) Luminal  may test positive for barbiturates (References: 33 and 52) Luminal®  contains barbiturates (Reference: 18) Lysergol  false positive for LSD (References: 3 and 18) MMa Huang (Ephedra sinica)  false positives for Amphetamines and Ecstasy (References: 20, 32, and 36)Marax  false positive for Ecstasy (MDMA), Meth (References: 3, 11, 16, and 18) Margestic  false positive for Opioids (Reference: 3) Marinol®  shows positive for Marijuana (THC) (References: 3 and 18) Maximum Strength Sineaid  false positive for Amphetamines (Reference: 3) Maximum Strength Sinus Gelcaps  (Reference: 18) Maximum Strength Sudafed Sinus  false positive for Amphetamines (Reference: 3) Maximum Strength Tylenol Sinus gelcaps  false positive for Amphetamines (References: 3 and 18) Meclomen  false positive for THC, Marijuana (References: 3, 18, and 52) Medacepan  may test positive for Benzodiazepines (References: 33 and 52) Medazepam  may test positive for Benzodiazepines (Reference: 33) Medipren  false positive for THC, Marijuana (References: 3 and 18) Mediprim  false positive for marijuana (Reference: 3) Mefenorex  false positive for Amphetamines and Ecstasy (References: 3, 11, and 18) Menstrual cramp medications  like Midol and Trendar (Reference: 26) Meperidine  false positive for phencyclidine (Reference: 32) Mephentermine  false positive for Amphetamines and Ecstasy (References: 3 and 11) Mesocarb  false positive for Meth and Ecstasy (References: 3, 11, 16, and 18) Methadone  contains synthetic opiates (Reference: 18) Methadone Hydrochloride  tests positive for methadone (Reference: 33) Methadose  may test positive for methadone (Reference: 33, 52) Methamprex  may test positive for methamphetamine (Reference: 33) Methedrine  may test positive for methamphetamine (Reference: 33) Methoxyphenamine  false positive for Amphetamines and Ecstasy (References: 3 and 11) Methphenidate  false positive for Amphetamines and Ecstasy (Reference: 11) Methyldopa  may test positive for amphetamine (Not yet documented but see the post by Marcie) Methylenedioxyamphetamine (MDA)  may test positive for amphetamines (Reference: 33) Methylenedioxymethamphetamine (MDMA)  may test positive for methamphetamine and ecstasy (Reference: 33) Methylphenidate (Ritalin)  an Amphetaminelike stimulant (References: 3 and 32) Methysergide/Sansert®  (Reference: 18) Methysergiside  false positive for LSD (Reference: 3) Metoclopramide  false positive for LSD (Reference: 47) Mexiletine (Mexitil®)  may test false positive for amphetamines (References: 57) Midol  false positive for THC, Marijuana (References: 3, 18, 26, and 29) Migraleve  may test positive for opiates (References: 33 and 52) Minithins  false positives for Amphetamines and Ecstasy (Reference: 20) Minocycline  can cause false positive results with certain urine tests. (Reference: 69) Miracle herb pills (Chinese herb)  contain benzodiazepines (Reference: 32) Mogadon  may test positive for benzodiazepines (References: 33 and 52) Morax  false positive for Amphetamines, Heroin, Opiates (Reference: 1) Morazone  false positive for Meth and Ecstasy (References: 3, 11, and 16) Morcap  positive for opiates (Reference: 33) Morphine Sulfate, including the trade names Astramorph, Cyclimorph, Duramorph, Morcap, MS Contin, Oramorph, Roxanol, and Severedol  positive for opiates (Reference: 33) Motrin  false positive for THC, Marijuana (References: 1, 3, 16, 18, 20, 26, and 29) Moxifloxacin (Fluoroquinolone)  false positive for opiates (References: 25 and 28) MS Contin  positive for opiates (Reference: 33) MS Contin Tablets®  contain morphine (Reference: 18) MSIR®  contains morphine (Reference: 18) Mudrane GC®  contains barbiturates (Reference: 18) NNaldecon  false positive for Morphine (1)Nalfon  false positive for Marijuana, Amphetamines, Barbiturates, Benzodiazephines, Methaqualone (References: 1, 3, and 18) Naprosyn  false positive for THC, Marijuana (References: 1, 3, and 18) Naproxen (Aleve)  false positive for THC, Marijuana (References: 1, 3, 16, 21) Naproxyn  (Reference: and 26) Nasal sprays (Vicks inhaler, Afrin)  false positive for Amphetamines and Ecstasy (References: 10, 16, and 21) Navonaprox  false positive for THC, Marijuana (Reference: 1) Nembutal  may test positive for barbiturates (References: 33 and 52) Nembutal Sodium  contains barbiturates (Reference: 18) Neosynephren  false positive reading for Amphetamines (References: 26 and 29) Neosynephrine  False positive for Amphetamines (References: 3, 18, and 26) Nexium  PPIs may test positive for THC (Reference: 37) Nitrazepam  may test positive for benzodiazepines (References: 33 and 52) No Drowsiness Sinarest Tablets  (References: 3 and 18) Nobritol  may test positive for Benzodiazepines (References: 33 and 52) Nobrium  may test positive for Benzodiazepines (References: 33 and 52) Noctamide  may test positive for Benzodiazepines (References: 33 and 52) Nonprescription products that contain opium  (i.e., morphine) (Reference: 18) Norcyclobenzaprine  false positive for Tricyclic Antidepressants (TCA) (Reference: 46) Norflex  false positive for Morphine (Reference: 43) Norfloxacin (Fluoroquinolone)  false positive for opiates (References: 25 and 28) Noroxin (Fluoroquinolone)  false positive for opiates (Reference: 28) Novahistine DH®  contains codeine (Reference: 18) Novahistine Expectorant®  contains codeine (Reference: 18) Novocain  may test positive for Opiates (Reference: 52) NSAIDS  false positive for THC, Marijuana (References: 3, 18, 20, and 32) Nucofed Expectorant  contains codeine (Reference: 18) Numorphan®  contains synthetic opiates (Reference: 18) Nuprin  false positive for THC (References: 3, 16, 18, 20, 26, and 29) Nyquil  false positive for Amphetamines, Heroin, Opiates, Morphine, Meth, Ecstasy, Methadone (References: 1, 3, 11, 14, 16, 18,20, 26, 29, and 43) OObetrol®  Amphetamines (Reference: 18)Ofloxacin (antibiotic)  false positives for opiates (References: 25 and 28) Omeprazole  PPIs may test false positive for THC (Reference: 37) Opazimes  may test positive for opiates (References: 33 and 52) Oramorph  positive for opiates (Reference: 33) Oramorph  contains morphine (Reference: 18) Ornade  false positive for Amphetamines (References: 3 and 18) Ortain  false positive for Amphetamines (Reference: 11) Orudis KT  false positives for THC (References: 3, 16, and 18) Orudis®  (Reference: 3, 18) OTC diet aids with phenylpropanolamine  (Dexatrim, Accutrim) (References: 11 and 36) Overthecounter nasal sprays  (See Vicks inhaler, Afrin) (References: 11, 16, 18, and 20) Oxaprozin  false positive for THC, Marijuana, Benzodiazepines (References: 3, 18, and 34) Oxaprozin (Daypro™)  may test false positive for benzodiazepines (References: 57) Oxazepam  contains benzodiazepines (Reference: 18) Oxazepam  will test positive for benzodiazepines (not false) (References: 33 and 52) Oxpam  may test positive for benzodiazepines (References: 33 and 52) Oxycodone (Oxycontin)  contains synthetic opiates (Reference: 18 and 33) Oxymorphone  contains synthetic opiates (Reference: 18) Oxymorphone (Numorphan)  may test false positive for oxycodone (References: 57) PPamprin®  false positive for THC, Marijuana (References: 3, 18, and 20)Pantoprazole (Protonix)  false positive for THC (Reference: 37 and 57) Papaverine (Papaverine)  may test false positive for opiates (References: 57) Paracetamol (Acetaminophen)/Codeine  (Reference: 33) Paracetamol with codeine  positive for opiates (References: 33 and 52) Paracodine®  contains synthetic opiates (Reference: 18) Paramol  may test positive for opiates (References: 33 and 52) Paregoric  contains opium/morphine (Reference: 18) ParGlycerolC (CV)  contains codeine (Reference: 18) PavacolD  may test positive for opiates (References: 33 and 52) Pedacare  false positive for Opioids (Reference: 3) Pediacof®  contains codeine (Reference: 18) Pediatric  may test positive for opiates (Reference: 33) Pediatric BP  Positive for Opiates (Reference: 52) Pefloxacin  false positive for Opiates (References: 25 and 28) Pemoline  false positive for Amphetamines and Ecstasy (References: 3 and 11) Pentobarbital  may test positive for barbiturates (References: 33 and 52) Pentobarbital Sodium  contains barbiturates (Reference: 18) Percocet  will test positive (not false) for opiates (References: 3 and 20) Percodan  contains Oxycodone (Reference: 33) Percodan®  contains synthetic opiates (References: 3, 18, and 20) Percovil  will test positive (not false) for opiates (Reference: 20) Perphenazine  false positive for Tricyclic Antidepressants (TCA) (Reference: 46) Perylamine  (Reference: 26) Phenaphen with Codeine®  (Reference: 18) Phendimetrazine  false positive for Amphetamines and Ecstasy (References: 3 and 11) PheneganD  false positive for Amphetamines, Ecstasy (MDMA), Meth (References: 3, 11, 16, and 18) Phenergan VC®  contains codeine (Reference: 18) Phenergan with Codeine®  (Reference: 18) Phenergan®  false positive for THC, Methadone (References: 3, 16, 18, and 43) PhenerganD  (Reference: 18) Phenmetrazine  false positive for Amphetamines and Ecstasy (Reference: 3, 11) Phenobarbital  contains barbiturates (References: 18 and 20) Phenobarbital  may test positive for barbiturates (References: 33 and 52) Phenobarbital  may cause falsepositive phentolamine test results. (Reference: 56) Phenobarbitone  may test positive for barbiturates (Reference: 33) Phenteramine  false positives (Reference: 36) Phentermine  false positive for Amphetamines and Ecstasy on urine tests (References: 3, 11, and 57) Phentermine  cross reactant for methamphetamine (Reference: 33) Phenylephrine  false positive for Amphetamines (References: 3, 18, and 57) Phenylephrine  false positive for Amphetamines (Reference: 11) Phenylpropanolamine  false positive for amphetamines (References: 3, 18, 22, 32, and 36) Phenylpropanolamine (PPA)  false positive for Meth (References: 11 and 16) Phenypropanolamine  false positive reading for Amphetamines (Reference: 29) Phenytoin (Dilantin®)  may test false positive for barbiturates (References: 57 Pholcodine  may test positive for opiates (References: 33 and 52) Pholedrine  false positive for Amphetamines, Meth and Ecstasy (References: 3, 11, 16) Physetone  may test positive for methadone (Reference: 33, and 52) PolyHistine  contains codeine (Reference: 18) Pondinil®  metabolizes to amphetamine (Reference: 18) Poppy Seeds contain morphine  positive for Heroin (MDMA), Opiates (References: 3, 16, 17, 20, 21, 25, 26, 29, 32, 48, and 60) Potentsex pills (Chinese herb)  contain benzodiazepines (Reference: 32) Prazepam  may test positive for benzodiazepines (References: 33 and 52) Prenylamine  metabolizes to amphetamine (Reference: 18) Preparations  positive for opiates (Reference: 33) Prescription medications that contain codeine  (Reference: 18) Prescription NSAIDS  (References: 18) and 20) Prescription sleeping pills  may test positive for Benzodiazepines (References: 3 and 20) Prevacid  PPIs may test positive for THC (Reference: 37) Prilosec  PPIs may test positive for THC (Reference: 37) PrimateneM  (Reference: 26, 29) Primatine Tablets  false positive for Ecstasy (MDMA), Meth (References: 3, 11, 16, and 18) Primidone (Mysoline®)  may test false positive for barbiturates (References: 57) Procainamide (Procainamide)  may test false positive for amphetamines (References: 57) Procaine  Positive for Opiates (Reference: 52) Prochlorperazine  false positive for LSD (Reference: 47) Promethazine  false positive for THC (References: 3, 16, and 18) Promethegan  false positive for THC (References: 3, 16, and 18) Propanolamine  (Reference: 26) Propoxyphene  contains synthetic opiates (Reference: 18) Propranolol (Inderal®)  may test false positive for amphetamines (References: 57 Propylephedrine  false positive for Amphetamines and Ecstasy (References: 3, 11, and 18) Proquin XR (Fluoroquinolone)  false positive for opiates (Reference: 28) ProSom  may test positive for Benzodiazepines (References: 33 and 52) Proton pump inhibitors  false positive for THC (Reference: 37 and 55) Protonix  false positive for THC (Reference: 37 and 55) Prozac (Fluoxetine Hydrochloride)  false positives for amphetamines (Reference: 31) Pseudoephederine (ClaritinD®/Sudafed®)  false positives for amphetamines and ecstasy (Reference: 20) Pseudoephedrine  may be detected as amphetamines (speed) (References: 3, 11, 18, 21, 36, 48, and 57) Pseudoephedrine  may test positive for amphetamines (Reference: 33) Pseudoephedrineare  false positive for amphetamines (Reference: 22) Purim cookies  contain poppy seeds, false positive for opiates (References: 13, 16, and 17) Pylorid  may test positive for methamphetamines (References: 33 and 52) QQuadrinal®  false positive for Amphetamines, Heroin, Opiates (References: 1 and 18)Quelichine  false positive for Amphetamines, Heroin, Opiates (Reference: 1) Quelidrine  false positive for Amphetamines, Heroin, Opiates (Reference: 1) Quetiapine (Seroquel)  false positive for amphetamines (Reference: 48) Quibron Plus  false positive for Amphetamines, Heroin, Opiates (Reference: 1) Quinine in Tonic water  positive for opiates (References: 26, 29 and 32) Quinacrine (Atabrine/Mepacrine)  may test false positive for amphetamines (References: 57) Quinolones  (Reference: 25) RRabeprazole  PPIs may test positive for THC (Reference: 37)Ranitidine  may show false positive for Amphetamines (References: 32, 36, and 52) Ranitidine  may test positive for methamphetamines (References: 33 and 52) Rantidine (Zantac®)  may test false positive for amphetamines (References: 57) Redux  false positive for Amphetamines, Meth and Ecstasy (References: 3, 11, and 16) Relafen  false positive for Marijuana (Reference: 3) Remedeine Forte  may test positive for opiates (Reference: 33) Remedeine  may test positive for opiates (Reference: 33) Remedine  positive for opiates (References: 33 and 52) Rescudose  contains morphine (Reference: 18) Restoril (Temazepam)  is a benzodiazepine (References: 33 and 52) Rexatal®  contains barbiturates (Reference: 18) Riboflavin (vitamin B2)  false positive for THC (References: 3, 16, 18, and 21) Rifampicin (antibiotic)  false positive for Opioids (Reference: 3) Rifampin  false positive for Opiates (References: 25 and 32 and 57) Risperidone  false positive for LSD (Reference: 47) Ritalin®  an Amphetaminelike stimulant (Reference: 18) Rivotril  may test positive for Benzodiazepines (References: 33 and 52) Rivotril®  contains benzodiazepines (Reference: 18) Robitussin  positive for opiates (Reference: 20) Robitussin AC®  contains codeine (Reference: 18) Robitussin Cold and Flu  false positive for Ecstasy (MDMA), Meth (References: 3, 11, 16, and 18) Robitussin DAC®  contains codeine (Reference: 18) Robitussin DM  false positive for Heroin, Opiates, Morphine (Reference: 1) Rohypnol  may test positive for Benzodiazepines (References: 33 and 52) Romilar  false positive for Heroin, Opiates, Morphine (Reference: 1) Roxanol  positive for opiates (Reference: 33) Roxanol  contains morphine (Reference: 18) Roxicet  contains Oxycodone (Reference: 33) Rufin  false positive for THC, Marijuana (References: 1 and 3) SSecobarbital  contains barbiturates (Reference: 18)Secobarbital  may test positive for barbiturates (References: 33 and 52) Secobarbital Sodium BellergalS®  contains barbiturates (Reference: 18) Seconal  may test positive for barbiturates (References: 33 and 52) Seconal Sodium  contains barbiturates (Reference: 18) Selegiline (Eldepryl)  false positive for Meth, Amphetamines and Ecstasy (References: 3, 11, 18, 36, and 57) Sensorcaine  may test false positive for cocaine (Reference: 59) Serax  may test positive for benzodiazepines (References: 33 and 52) Serax®  contains benzodiazepines (Reference: 18) Seroquel (quetiapine)  falsepositives for amphetamines (Reference: 48) Sertraline  false positives for benzodiazepines and LSD (Reference: 44, 47, and 57) Sertraline  may test positive for benzodiazepines (Reference: 33) Severedol  positive for opiates (Reference: 33) Shampoo containing hemp  (Reference: 29) Silexin  false positive for Heroin, Opiates, Morphine (Reference: 1) Sinarest  false positive for Amphetamines, Morphine (Reference: 1) SineAid Tablets Maximum Strength  (Reference: 18) SineOff  false positive for Morphine (Reference: 1) Sinequan  may test positive for Tricyclic Antidepressants (References: 33 and 52) Sinex  false positive for Amphetamines (Reference: 3) Sinubid  false positive for Morphine (Reference: 1) Sinus Excedrin Extra Strength Caplets  false positive for Amphetamines (References: 3 and 18) Solfoton®  contains barbiturates (Reference: 18) Solpadol  positive for opiates (Reference: 33) Solpadol  may test positive for opiates (References: 33 and 52) Soma  false positive for Morphine (Reference: 43) Soma with Codeine  (Reference: 18) Somnite  may test positive for benzodiazepines (References: 33 and 52) Soneryl  may test positive for Barbiturates (References: 33 and 52) Sparfloxacin  (Reference: 25) St. Joseph's Cough Syrup  false positive for Heroin, Opiates, Morphine (Reference: 1) Stesolid  may test positive for Benzodiazepines (References: 33 and 52) Strong BP  may test positive for opiates (References: 33 and 52) Suboxone (Buprenorphine)  may test false positive for oxycodone (Reference: 54) Sudafed  false positive for Amphetamines, Meth and Ecstasy (References: 3, 11, 16, 18, 20, 26, and 29) Sudafed  may test positive for amphetamines (Reference: 33) Sustiva (Efanirenz)  false positive for THC or Marijuana (References: 38 and 52) Sustiva  may test positive for THC (References: 33 and 49) Synalgos DC®  contains synthetic opiates (Reference: 18) TTavistD  false positive for Meth and Ecstasy (References: 3, 11, 16, and 18)Tedral  false positive for Amphetamines, Heroin, Opiates (Reference: 1) Tegisec®  metabolizes to amphetamine (Reference: 18) Temazepam (Restoril)  is a benzodiazepine (References: 33 and 52) Thebacon  may test positive for opiates (References: 33 and 52) Thioridazine (Mellaril)  false positive for phencyclidine (PCP) and LSD (References: 32, 33 and 47) Thioridazine  false positive for Tricyclic Antidepressants (TCA) (Reference: 46) Thorazine  false positives (Reference: 36) Tolectin®  false positive for THC, Marijuana (References: 3, 18, and 20) Tonic water  false positive for cocaine (References: 16 and 18) Tranxene  may test positive for Benzodiazepines (References: 33 and 52) Trazodone (trazadone, trazedone)  false positive for amphetamines (Reference: 32 and 57) Trazodone  false positive for LSD (Reference: 47) Trendar Cramp Relief Formula  false positive for THC, Marijuana (References: 3, 18, 26, and 29) Triaminic 12  false positive for Amphetamines (References: 3 and 18) Triaminic Expectorant with Codeine®  (Reference: 18) Triaminicin  false positive for Amphetamines, Morphine (Reference: 1) Triazolam (Halcion)  Positive for Benzodiazepines (Reference: 52) TriazolamHalcion®  contains benzodiazepines (Reference: 18) Tricyclic antidepressants  may produce falsepositive results for amphetamines (Reference: 48) Trimethobenzamide  false positives (Reference: 36) Trimeprazine  false positive for Tricyclic Antidepressants (TCA) (Reference: 46) Triminicol  false positive for Morphine (Reference: 1) Triprolidine  false positive for LSD (References: 3 and 18) Triptafen  Positive for Tricyclic Antidepressants (Reference: 52) TriptafenM  Positive for Tricyclic Antidepressants (Reference: 52) Trucal  false positive for Heroin, Opiates, Morphine (Reference: 1) Tryptizol  Positive for Tricyclic Antidepressants (Reference: 52) Tuinal  Positive for Barbiturates (Reference: 52) Tussagesic  false positive for Morphine (Reference: 1) Tussaminic  false positive for Heroin, Opiates, Morphine (Reference: 1) Tussar 2®  contains codeine (Reference: 18) Tussar SF®  contains codeine (Reference: 18) Tussinic  false positive for Heroin, Opiates, Morphine (Reference: 1) TussiOrganiden  contains codeine (Reference: 18) Tylenol (acetaminophen) with Codeine®  (References: 3, 18, 20, and 33) Tylenol 3  may cause positive for opiates (Reference: 20) Tylenol 3  positive for opiates (References: 33 and 52) Tylenol 4  may cause positive for opiates (Reference: 20) Tylenol Cold (combination)  may test positive for amphetamines (Reference: 33) Tylenol Simply Sleeps (Diphenhydramine)  false positive PCP results (Reference: 24) Tylenol Sinus  false positives for Amphetamines and Ecstasy (Reference: 20) Tylenol Sinus gelcaps, Maximum Strength  false positive for Amphetamines (References: 3 and 18) Tylenol with codeine  Positive for Opiates (Reference: 52) Tylex  positive for opiates (References: 33 and 52) Tylex  may test positive for opiates (Reference: 33) UTramadol (Ultram)  may test false positive for phencyclidine (PCP) and methadone (Reference: 62, 63), and 64)Unisom Nighttime Sleep Aid  false positive for Morphine (Reference: 43) VValclair  may test positive for Benzodiazepines (References: 33 and 52)Valerian Root and extract  false positives for Benzodiazepines (Reference: 36) Valium  may test positive for Benzodiazepines (Reference: 33) Valium® (Diazepam)  contains benzodiazepines (References: 18 and 20) Valrelease®  contains benzodiazepines (Reference: 18) Venlafaxine hydrochloride (Effexor)  false positive for PCP (Reference: 52) Verapamil  false positive for LSD (Reference: 47) Vicks Cough Syrup  false positive for Heroin, Opiates, Morphine (Reference: 1) Vicks Formula 44M  false positive for heroin, Methadone (References: 1, 14, 26, 29, and 43) Vicks Inhaler  false positive for Ecstasy (MDMA), Meth (References: 3, 11, 16, and 18) Vick's Inhaler  may test positive for methamphetamine (References: 33 and 36) Vicks Nasal Spray  (References: 26 and 29) Vicks Nyquil  false positive for Ecstasy (MDMA), Meth (References: 3, 11, 16, and 18) Vicodin ES®  contains synthetic opiates (References: 3 and 18) Vicodin  may test positive for opiates (References: 33 and 52) Vitamin B2  false positive for THC (References: 3, 16, and 18) Vivacaine  may test false positive for cocaine (Reference: 59) Voltaren (diclofenac, Cataflam, Arthrotec(combined with misoprostol))  false positive for THC, Marijuana (References: 3 and 18) WWellbutrin  false positive for Amphetamines (Reference: 12)Wigraine®  false positive for LSD (References: 3 and 18) Wygesic  will test positive (not false) for opiates (Reference: 20) XXanax  Positive for Benzodiazepines (Reference: 52)Xanax® (Niravam, Alprazolam)  contains benzodiazepines (Reference: 18) Xepin  may test positive for Tricyclic Antidepressants (Reference: 33, 52) XTC (slang)  may test positive for methamphetamine and ecstasy (Reference: 33, 52) ZZantac (ranitidine)  may test positive for methamphetamines (References: 33 and 52) Zantac (ranitidine)  may test positive for amphetamines (References: 57)Zegerid  PPIs may test positive for THC (Reference: 37) Zoloft  may test false positive for benzodiazepines (Reference: 31) Zoloft  may test positive for benzodiazepines (Reference: 33) Zyban  may cause a false positive for amphetamines (Reference: 68) ZyrtecD  contains pseudoephedrine that may cause a false positive for amphetamines (References: 3, 11, 18, and 21) * PDR in this context refers to the Physician's Desk Reference. Feedback on False PositivesFalse positive?Date: 12/26/2004 My son is addicted cocaine. He came home for a visit, and was sick. I gave him med for sinus treatment which I take as needed. It does not cause drowsiness. I gave him Sudafed and some cough medication, and Amoxicillin. He is currently residing in a Rehab, and had to test when he got back there. His test was positive. My son insisted that he had not taken anything. He says that he drank two cans of beer which were given to him. I have research several sites, and I don't know what to do. He needs to be in rehab. Some of the info that I have read lists amoxicillin as a cause for false positive. My son also has Hep C. He states that he has been clean since entering rehab. Cleo AskDocWeb: Check the label of the cough medication you gave him. Some over the counter cough syrups have codeine in them and that can cause a false positive. Also, the Amoxicillin can cause a false positive for cocaine. Failing drug tests Date: 1/26/2005 My husband takes Phenergan and Zantac on a daily basis. He also goes to a Methadone clinic. He passed had every drug test for over a year. Nothing changed he always took these drugs. But he started failing the drug tests. They said it was for Amphitamines. Is this possible? He has passed other drug test given for work. At the same time. Trina AskDocWeb: Phenergan is for nausea and vomiting, and only to be used for a short time just for these symptoms. The Zantac is on the list. Tested positive for marijuana Date: 7/23/2005 A friend of mine does not use drugs. Yet, his drug test came back positive for marijuana. He had been taking about 3600mg/day of ibuprofen. We would like to find reputable information related to ibuprofen causing false positives for marijuana. Gary AskDocWeb: Are you sure he tested positive for marijuana or was it positive for drug abuse? He is taking more than the recommended amount of ibuprofen and overdosing on ibuprofen is known to cause false positives for marijuana on test results. Tested positive for heroin Date: 8/6/2005 I feel completely helpless and hopeless. I test positive for heroin and I DO NOT use illegal drugs, but I do take quinine for leg cramps. The testing device is an ion (vacuumtype) device and info would be appreciated. Thank you. Carolyn AskDocWeb: If the lab that tested you wasn't certified, we suggest you get tested by one that is certified. And let them know that you are taking quinine. Quinine false positive Date: 12/9/2005 Some websites state that quinine can produce a false positive for cocaine use. Is this true or is it only true for opiates? BB AskDocWeb: As far as we know, it is only true for opiates. Arrested for DUI Date: 1/5/2006 I was pulled over a year ago and arrested for DUI. After blowing 0.0% because I had not been drinking the police gave me a 5 minute urine drug screen. They claimed it showed THC and meth.?? I use neither. I did tell them prior to the test that I had been taking metabolife and an over the counter allergy med I think Sudafed. All charges were dropped and they sent my urine to the crime lab. Now over a year later they have pressed charges. They said I did not have THC in my urine but I did have methamphetamine antanphetamines. I have never used these illegal substances, could the over the counters produce a false test? Thanks Julie AskDocWeb: Yes, Sudafed is known to cause false positives on some urine drug tests. Tested positive for amphetamines Date: 2/2/2006 I recently tested positive for amphetamines, I do NOT use drugs and this was for a really good job. I took Nyquil the night prior to the test because I've had a cold for the past 2 weeks. I know it had to be the nyquil, is there any way to convince the employer. Prior to the screening I did disclose the fact that I used Nyquil. Dan AskDocWeb: The only way we know to convice an employer when a urine drug test produces a false positive is to get a GC/MS confirmation test on the original sample. False positives? Date: 2/7/2006 Will any of the following give a false positive cocaine reading. Zithromax, Prednisone, Albuterol liquid, or Levaquin Ross AskDocWeb: Since Prednisone is a steroid, it may show up on a drug screen if they are testing for steroids, otherwise no. Hydrocodone false positive Date: 3/8/2006 I recently took a drug test and tested positive for hydrocodone (per saliva test). I have Never taken hydrocodone or any prescription pain medication. The day of the test, I took 2 Excedrin Migraines and 2 ibuprofen. Could these two medications produce a false hydrocodone result? Miriam AskDocWeb: We know that Excedrin may cause false positives but we don't know if it was for hydrocodone or something else. Ibuprofen may cause false positives for THC but not hydrocodone. Positive for methadone Date: 3/16/2006 Our company does random drug testing and called me the other day for a urine test. My results for methadone came up positive but I have never touched a drug in my life. I have not taken any medication and I have no idea what could have caused this. Is there any thing you can tell me that may cause a false positive. ML AskDocWeb: Yes, Nyquil Nighttime Cold Medicine has been reported to sometimes cause false positives for Methadone for up to 2 days after taking it. Drug tests Date: 3/23/2006 I am looking into a career with the CIA and was wondering if you had any idea how extensive their drug tests are. I have been taking Vicodin for my migraines, cold medication(Nyquil at night and Tylenol during the day) is this going to be a problem? Any info would be appreciated. Ed AskDocWeb: We are pretty sure that the CIA knows which products cause false positives. Many people take Tylenol and Nyquil for their colds and they will know that, but to be on vicodin for a migraine is something else. That could be a problem. In trouble Date: 3/23/2006 My boyfriend got arrested for possession of marijuana and he quit smoking because he knows its not even worth getting in trouble over, but his drug test came back positive for opiates and he doesn't do any drugs. He takes Advil sometimes for headaches and he just had a cold and took some cold medicine but other then that he doesn't do anything. Is there any way at all to prove his innocence? He's being told now there is a warrant out for his arrest and he will probably be arrested tomorrow...but for nothing and I don't understand this. He's got a warrant out for his arrest for doing what he is supposed to do and still he is in trouble... Caiti AskDocWeb: For others in this situation, if you take cold medicine it may be helpful to keep the receipt as proof of purchase. False positive? Date: 3/24/2006 Can Fioricet cause a false positive for amphetamines? sandra AskDocWeb: No, Fioricet is a combination drug that contains acetaminophen (Tylenol), caffeine, and butalbital. Butalbital is a barbiturate, which is a depressant. Amphetamines are stimulants and have very different chemical structures. Read more feedback about false positives. While we do NOT support drug abuse we do believe this information should be available to everyone that has a false positive on a urine drug test. For some people their job is at stake, for others it may make the difference in deciding the custody of their children. 


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