Fursultiamine is often used to treat thiamine deficiency, which can lead to a condition known as beriberi, as well as Wernicke-Korsakoff syndrome, a neurological disorder often seen in alcoholics.
Common side effects of fursultiamine may include stomach upset, headache, and allergic reactions. More serious side effects may include anaphylaxis, a severe allergic reaction. It is important to take fursultiamine supplements as directed by a healthcare provider and to report any side effects or concerns promptly.