Vitamin B2 Side Effects
Generic name: riboflavin
Note: This document contains side effect information about riboflavin. Some of the dosage forms listed on this page may not apply to the brand name Vitamin B2.
Applies to riboflavin: oral capsule, oral tablet
Side effects requiring immediate medical attention
Along with its needed effects, a dietary supplement may cause some unwanted effects. Riboflavin may cause urine to have a more yellow color than normal, especially if large doses are taken. This is to be expected and is no cause for alarm. Usually, however, riboflavin (the active ingredient contained in Vitamin B2) does not cause any side effects. Check with your health care professional if you notice any other unusual effects while you are using it.
Medically reviewed by Drugs.com. Last updated on Nov 14, 2020.
More about Vitamin B2 (riboflavin)
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Some side effects may not be reported. You may report them to the FDA.