What are the possible side effects of Thiamine (Vitamin B1)?
Stop taking thiamine and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives). Other side effects may also occur. Talk to your doctor if you experience a feeling of warmth itching or hives weakness sweating nausea; and restlessness Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. You may report side effects to FDA at 1-800-FDA-1088.