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Natural health supplements sometimes have unexpected side effects or interactions with medication that can lead to adverse reactions that are sometimes life threatening. The following is a list of cautions that you should be aware of before using Calendula (Calendula arvensis). These are referred to as drug/herb interactions.

Warning 1 - Counterindications: Calendula plants are known to cause allergic reactions and should be avoided during pregnancy. There is also a concern that it might cause a miscarriage.

Warning 2 - CNS depressants (Sedative medications): Calendula might interact with drugs that cause sleepiness. Taking calendula along with sedative medications might cause too much sleepiness.

Some sedative medications include clonazepam (Klonopin), lorazepam (Ativan), phenobarbital (Donnatal), zolpidem (Ambien), and others.

Warning 3 - Surgery: Calendula might cause too much drowsiness if combined with medications used during and after surgery. Stop taking calendula at least 2 weeks before a scheduled surgery.

Warning 4 - Allergy alert: Calendula may cause an allergic reaction in people who are sensitive to the Asteraceae/Compositae family. Members of this family include chrysanthemums, daisies, marigolds, ragweed, and many others. If you have allergies, be sure to check with your healthcare provider before taking calendula.

Used as a natural health remedy: Calendula is used internally for the following benefits and conditions:
  • Acne
  • Cancer (11)
  • Fever (reduces) (12)
  • Gallbladder disorders (11)
  • Inflammation (11)
  • Menstrual cramps (12)
  • Mouth infections (11)
  • Skin disorders (1)
  • Skin infections (11)
  • Start menstrual periods
  • Stomach ulcers ((12, 13))
Used as a natural health remedy: Calendula is used externally (one the skin) for the following benefits and conditions:
  • Cancer
  • Fever
  • Hemorrhoids
  • Inflammation of the lining of the eyelid (conjunctivitis)
  • Inflammation of the rectum (proctitis)
  • Leg ulcers
  • Muscle spasms
  • Nosebleeds
  • Promoting menstruation
  • Reduce pain and swelling (inflammation)
  • Treating mouth and throat soreness
  • Varicose veins
  • Wounds to speed healing
Calendula contains the following nutrients: Carotenoids, Lutein, Quercetin, Vitamin C, Saponins, and Lycopene.

Side Effects of Calendula

Aside from possible allergic reactions calendula has no reported side effects.

As with any herb, a serious allergic reaction is possible. Seek immediate medical attention if you notice any symptoms of a serious allergic reaction. These may include a rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, or trouble breathing.

Calendula is also known as Calendula officinalis, Calendule, English Garden Marigold, Fleur de Calendule, Fleur de Tous les Mois, Garden Marigold, Gold-Bloom, Holligold, Marigold, Marybud, Pot Marigold, Souci des Champs, Souci des Jardins, Souci des Vignes, Souci Officinal, Zergul.

Return to the Herb List.

For questions and answers about the side effects of herbs see the Herb Forum

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This consumer advocate website is protected by copyright 2014 Askdocweb, Inc. All Rights Reserved. This is a layman's report on Calendula and is not intended to replace discussions with a health care provider. Do not use the information on this forum as a substitute for your doctor's advice. Always consult your doctor before taking any drug and follow your doctor's directions. Source material: Food and Drug Administration, Medline, Physician's Desk Reference, and the largest community of people in the world, those who are concerned about side effects and healthcare.
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