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Span C Side Effects

Generic name: bioflavonoids

Note: This document contains side effect information about bioflavonoids. Some of the dosage forms listed on this page may not apply to the brand name Span C.

Applies to bioflavonoids: oral capsule

Side effects not requiring immediate medical attention

Some side effects of bioflavonoids (the active ingredient contained in Span C) 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

  • 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, scaling, or cursed skin
  • slow or fast heartbeat
  • swollen feet and ankles

Medically reviewed by Last updated on Nov 28, 2020.

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Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.