About this information
This NHS content is written for people in England. Medicine names, availability, prescribing and services may differ in other countries.
Who can take thiamine
Most adults and children aged 12 years old and over can take thiamine.
Only give thiamine to a child under 12 years old if a specialist recommends it.
Who may not be able to take thiamineThiamine may not be suitable for some people. To make sure it's safe for you, tell your doctor before starting to take thiamine if you:
- have ever had an allergic reaction to thiamine or any other medicine
- are due to have any blood tests or scans – thiamine can affect the results of certain tests
View the original NHS website page ↗. Refreshed 19 August 2026.
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