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Medically reviewed by Last updated on Sep 26, 2019.

What are other common names?

  • 2-(3,4-Dihydroxyphenyl)-3,5,7-trihydroxy-4H-1-benzopyran-4-one
  • 3, 3′, 4′, 5, 7-pentahydroxy-2-phenylchromen-4-one
  • 3,3',4'5,7-Penthydroxyflavone
  • Bioflavonoid
  • Bioflavonoid Complex
  • Bioflavonoid Concentrate
  • Bioflavonoid Extract
  • Bioflavonoids
  • Bioflavonoïde
  • Bioflavonoïde de Citron
  • Bioflavonoïdes de Citron
  • Citrus Bioflavones
  • Citrus Bioflavonoid
  • Citrus Bioflavonoid Extract
  • Citrus Bioflavonoids
  • Citrus Flavones
  • Citrus Flavonoids
  • Complexe de Bioflavonoïde
  • Concentré de Bioflavonoïde
  • Extrait de Bioflavonoïde
  • Extrait de Bioflavonoïdes de Citron
  • Flavones de Citron
  • Flavonoid
  • Flavonoids
  • Flavonol
  • Flavonoïde
  • Meletin
  • Mélétine
  • Pentahydroxyflavone
  • Quercetin Dihydrate
  • Quercetina
  • Quercetine
  • Quercétine
  • Sophretin
  • Sophrétine
  • Vitamin P

What is this product used for?

Quercetin is used by some people to lower blood pressure. Others believe it helps with cancer and may improve social skills in children with autism. Quercetin is used by some men to help with prostate problems.

What are the precautions when taking this product?

  • Always check with your doctor before you use a natural product. Some products may not mix well with drugs or other natural products.

  • Avoid the use of quercetin while taking digoxin.

  • Take extra care if you are taking drugs to thin your blood. These are drugs like warfarin (Coumadin).

  • Do not use this product if you are pregnant or plan to become pregnant soon. Use birth control you can trust while taking this product.

  • Do not use this product if you are breastfeeding.

  • Take extra care and check with your doctor if you have:

    • Heart problems

    • High blood pressure

    • Liver problems

    • Infection requiring antibiotics

What should I watch for?

  • Upset stomach

  • Tingling in the arms or legs

When do I need to call the doctor?

  • Signs of a very bad reaction. These include wheezing; chest tightness; fever; itching; bad cough; blue skin color; seizures; or swelling of face, lips, tongue, or throat. Go to the ER right away.

  • Very bad throwing up

  • Very bad headache

Last Reviewed Date


Consumer information use

This information is not specific medical advice and does not replace information you receive from your healthcare provider. Only your healthcare provider has the knowledge and training to provide advice that is right for you. You should not rely on this information in deciding whether or not to use, or accept your healthcare provider’s advice regarding use of, any natural products or similar treatments, therapies, or life-style choices. This information does not endorse any natural products or similar treatments, therapies, or life-style choices as safe, effective, or approved for treating any patient or health condition. This is only a brief summary of general information. It does NOT include all information about natural products, possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to you. You must talk with your healthcare provider for complete information about your health and treatment options.


Copyright © 2018 Wolters Kluwer Clinical Drug Information, Inc. and its affiliates and/or licensors. All rights reserved.

Further information

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