Quercetin Side Effects
Generic name: bioflavonoids
Medically reviewed by Drugs.com. Last updated on Mar 7, 2025.
Note: This document provides detailed information about Quercetin Side Effects associated with bioflavonoids. Some dosage forms listed on this page may not apply specifically to the brand name Quercetin.
Applies to bioflavonoids: oral capsule.
Other side effects of Quercetin
Some side effects of bioflavonoids (the active ingredient contained in Quercetin) may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.
Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common side effects
- blurred vision
- dizziness
- dull ache or feeling of pressure or heaviness in legs
- fluid accumulation in the knee
- headache
- itching skin near damaged veins
- nervousness
- pounding in the ears
- red or scaling skin
- slow or fast heartbeat
- swollen feet and ankles
Frequently asked questions
- What is Quercetin and what are its health benefits?
- What are antioxidants and should you take supplements?
More about Quercetin (bioflavonoids)
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Further information
Quercetin side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.