Taking thiamine with other medicines and herbal supplements

It's generally safe to take thiamine while you're taking other medicines.

However, check with a doctor before starting on thiamine if you're taking fluorouracil, a medicine used to treat some types of cancer.

Fluorouracil can affect the way thiamine works. The doctor may need to adjust your dose of thiamine.

Talk to a pharmacist or doctor before taking any herbal remedies or supplements together with thiamine.

Some vitamin and mineral supplements may already contain thiamine. Always check the labels carefully.

Tell your doctor or pharmacist if you're taking any other medicines, including herbal remedies, vitamins or supplements.