Report on Ionamin Side Effects and Usage by AskDocWeb

About Ionamin

Picture of Ionamin     Ionamin picture

What is Ionamin?

Ionamin is a brand name of Phentermine. This medicine is an appetite suppressant used along with diet, exercise, and behavior therapy for the short-term management of obesity.

How does Ionamin work?

This medicine works by decreasing your appetite. Use it with an overall plan to reduce your weight.

What side effects do users of Ionamin report?

Side effects that may occur while taking this medicine include restlessness, nervousness, difficulty sleeping, or dry mouth. If they continue or are bothersome, check with your doctor. If you notice other effects not listed above, contact your doctor, nurse, or pharmacist.

What are the symptoms of overdose or something gone wrong?

If overdose is suspected, contact your local poison control center or emergency room immediately. Symptoms of overdose may include restlessness, tremor, rapid breathing, confusion, nausea, vomiting, diarrhea, and stomach cramps.

If you miss a dose of Ionamin

If you miss a dose of this medicine, take it as soon as possible. If it is after noon, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

Conditions you should tell your Doctor about before taking Ionamin:


Emotional problems


Heart condition

High blood pressure

Over-active thyroid (hyperthyroidism)

Tell your doctor about any other medical conditions or allergies you may have.

Before you have any medical or dental treatments, emergency care, or surgery, tell the doctor or dentist that you are using this medicine.

For women: if you plan to become pregnant, discuss with your doctor the benefits and risks of using this medicine during pregnancy. It is unknown if this medicine is excreted in breast milk. Do not breast-feed while taking this medicine.

Tell Your Doctor if you’re taking any of the following medicines:

Do not use this medicine if you are also taking guanadrel, guanethidine, furazolidone, or monoamine oxidase inhibitors (MAOIs).

Storing Ionamin

Store this medicine at room temperature in a tightly closed container, away from heat, light and children.

General Notes

Follow the directions for using this medicine provided by your doctor. Swallow whole. Do not break, crush, or chew before swallowing. Take your dose in the morning before breakfast or 2 hours after breakfast as directed by your doctor. Be sure you take your dose at least 10 to 14 hours before bedtime.

Do not exceed the recommended dose or take this medicine for longer than prescribed without checking with your doctor. Exceeding the recommended dose or taking this medicine for longer than prescribed may cause serious side effects. Keep all doctors and laboratory appointments while you are using this medicine.

Do not drive, operate machinery, or do anything else that could be dangerous until you know how you react to this medicine. Do not share this medicine with others.

Ionamin is not addictive.

Common Misspellings for Ionamin

Ionamin is often misspelled, as many people hear the word verbally, write it down and spell it incorrectly. Here are a few of the most common misspellings for Ionamin: Ionemin, Ionamen, Inamin, Ianomin, and ioneman.

Ionamin Feedback

If you’ve used Ionamin, please help others by adding your feedback. What would you tell someone considering using this product? Please remember that we do not give medical advice. That is for your local health care provider, who is familiar with your medical history. You can use the form below to add your comments,
feedback or Ionamin review.

Subj: Ionamin Feedback

I have found Ionamin to be my saving grace. In 10 weeks, I have lost approx 28 pounds and I feel wonderful. I have over 40 pounds left to go, but with Ionamin, I know I will make my goals. I have tried everything before to lose weight, and I have never been successful UNTIL NOW. I am under Dr.s care for hypothyroidism, and everything is working well. Blood levels are great, and so is my energy level.

Thanks for Ionamin!!


Subj: Ionamin feedback
Date: 6/25/2003
My feedback is from using it previously a few years ago. It was the best thing for weight loss I have ever tried. I lost 93 pounds over a year by using Phentermine for the first 3 months. It kept me from overeating long enough to develop a pattern of eating much less and I was able to successfully keep off the weight until I got pregnant 3 years later (which is why I’m now using it again – can’t lose the weight I gained while pregnant).

Subj: Ionamin?
Date: 10/11/2003
I just wanted to know how over weight should you be to use ionamin do you have to be obese or can you just be overweight?


AskDocWeb: You just have to be overweight. To qualify as overweight you have to have a Body Mass Index (BMI) of 27.0 or greater. You can use our calculator to find your Body Mass Index.

Subj: Lost 20 pounds
Date: 2/11/2004
I have been taking ionamin for 1 month and have lost 20 pounds which I am obviously very happy with. I have virtually no appetite at all. My only problem is that I have no energy at all, which is not mentioned by any one else.


Subj: How long when switching
Date: 2/18/2004
I have been taking meridia. It is not working. How long do I have to wait before taking Ionamin?


Subj: How long when switching
Date: 2/18/2004
I have been taking meridia. It is not working. How long do I have to wait before taking Ionamin?


AskDocWeb: If Meridia didn’t work for you then Ionamin is not likely to work either. Ionamin is just the timed-release version of Meridia.

Subj: Need to loose 40 lbs.
Date: 3/2/2004
I used Ionamin years ago and lost the weight I needed to. However I am now 52 yrs. old and need to loose at least 40 lbs. But I am taking Paxil, Prevacid and Ambien to sleep. How will these meds interact with Ionamin? Isn’t Phentermine dangerous? I also have plaque buildup on my right coronary vessel (not dangerous at this time) Would Ionamin have any effect on this?. My heart is in good condition other then that and all I needed to do was get my cholesterol down which I did. Please respond as soon as possible as I have a Dr’s appointment in a month and I would like to talk to him about taking Ionamin. Thank you.


AskDocWeb: We do NOT give medical advice here. We do product reviews and provide a forum so users can tell others about their experience with health products.

Subj: Taking Ionamin 15
Date: 3/19/2004
I have just starting taking Ionamin 15 and was disappointed to have only lost 4# in two weeks is this the normal pace or should I increase my dose? I have cut back to less than 1200 cal’s and less than 20 fat grams? This is a drastic change for me.


Subj: Lose some extra weight
Date: 5/20/2004
I am going for a breast reduction in 3 weeks. My doctor has put me on Ionamin to lose some extra weight before the operation. Should I still eat even though I am not hungry? and if so, how much and what? Thank you.


AskDocWeb: Your doctor should be able to provide you with information on a balanced diet, which would depend on your current weight, height, etc..

Subj: Irregular heartbeat
Date: 6/24/2004
I took Ionamin 1 pill daily for 7 days. The 2nd or 3rd day I started sighing, not realizing I was actually having difficulty breathing. After the 7th day, I decided to stop but after 2 days or so after stopping, I developed chest pains and breathlessness and was admitted to A&E twice. Echo, ECG all normal though. After 1 month, I was back to normal but life is never the same. Every few months, I would get sudden mid chest pain and down my left arm together with cold profuse sweating that last for longest 30 minutes, shortest 10 minutes, up till now. It would feel like I am having a heart attack. I was diagnosed with irregular heartbeat with extra ventricular beat from which I recovered when I was way too young prior to the Ionamin consumption. I had one incident of hyperventilation 10 years ago. Other than that I had no other problem. I can’t, nor the doctors are able to figure out what is causing the frequent chest pains.


Subj: Eye bags
Date: 7/4/2004
Hi! I’m taking Ionamin. I took 15mg for 5 days (lost 4kg), and am now on my 2nd day of 30mg. When I was on 15mg, I slept about 4hrs a night and still felt rested and energized. However, now on 30mg, I’m sleeping like 1.5hrs a night, and I’m having eye bags! Even though I’m trying hard to sleep.


AskDocWeb: Please see Eye Bags.

Subj: Weightloss has stopped
Date: 10/25/2004
I started taking ionamin exactly a month a go. The first two weeks I lost 10LBS. Now two weeks later and I am still the same weight. Is this ok, should I continue to take this, will I still lose weight if I continue? Has anyone experienced this? I am taking the 30mg aday.


Subj: Is this normal?
Date: 1/7/2005
Is it normal to not feel hungry at all while on ionamin? I am currently on the 30mg pill and just do not have an appetite at all. Is it normal to feel hyper?


AskDocWeb: Ionamin is suppose to reduce your appetite, not eliminate it. Feeling hyper is a side effect of Ionamin. Be sure to put that feeling to good use with more exercise.

Subj: More than I can handle
Date: 1/9/2005
Hi. I started taking Ionamin 3 days ago, and the side effects are more than I can handle. Although my appetite is gone, I am taking myself off of it. When on it, I feel confused, VERY irritable, sad and out of control. I feel like a miserable person.


Subj: My feedback about ionamin
Date: 2/11/2005
Hi I just wanted to add my feedback about ionamin. I have been on Ionamin 30mg for almost 2 mths now. I have lost close to 30lbs which is great, but lately I have been having irregular heart beats, chest pain, heaviness in the chest, shortness and difficulty breathing and ridiculously sore breasts. I also have the signs of bipolar, which is apparently an extremely serious side effect of this drug, as listed in a canadian medical book used by hospitals. This drug is not something to be taken lightly. I loved it at first, but now I am off it because I found out it was taken off the market years ago for causing “widowmaker” heart attacks and suicide in people. It is a dangerous drug.


Subj: Absolutely addicted
Date: 3/29/2005
I have been taking ionamin for years. I am absolutely addicted, yet my doctor keeps filling my prescription without fail. I lost lots of weight in the beginning but it has crept back. If I double my dosage I can get results for a short time, but system tolerance develops quickly. The dosage needs to be increased often to be effective. As I said, I have taken it for years, abusing it regularly for upcoming events to try getting back into shape. But it is a loose / loose situation. Lost a little weight – lost my muscle tone – lost my memory – lost my erections…but gained an addition.


Subj: Continue or not?
Date: 6/13/2005
I took ionamin for 90 days taking three pills a week and lost 53lbs. Now I can’t eat as much but my cravings are for sweets. Should I continue using this medication or just continue to try and work on my appetite myself.


AskDocWeb: Congratulations Tonya! Losing 53 pounds is an impressive accomplishment. You need to talk to your doctor to find out how close you are to your ideal weight before you decide to discontinue it. Working on your appetite is important but so is getting plenty of exercise. Just keep telling yourself that this is for a good cause, and that you will feel better and have better health if you maintain your ideal weight. Read more feedback about Ionamin

Last post: December 9, 2015