Thiamine (Benerva, Tyvera)

Thiamine is a type of vitamin B.

It is recommended as a vitamin supplement for people who cannot get sufficient vitamin B1 from their normal diet.

It is unlikely to cause side-effects.

Type of medicineVitamin B1
Used forThiamine deficiency
Also calledBenerva®; Tyvera®
Available asTablets

Thiamine is a type of vitamin B. Several different substances belong to the group of vitamins known as the B vitamins. Thiamine is known as vitamin B1.

Foods that are good natural sources of thiamine are cereals, nuts, peas, beans and pork. Although thiamine deficiency tends to be rare in the UK, your doctor may recommend that you take a supplement of thiamine if for some reason you cannot get sufficient vitamin B1 from your normal diet.

Thiamine is also an ingredient of a number of multiple-vitamin preparations that are available to buy without a prescription.

To make sure that this is the right treatment for you, before you start taking thiamine it is important that you speak with a doctor or pharmacist:

  • If you are pregnant or breast-feeding. This is because, while you are expecting or feeding a baby, you should only take medicines on the recommendation of a doctor.
  • If you have ever had an allergic reaction to a medicine.
  • Before you start taking thiamine, read the manufacturer's printed information leaflet from inside the pack.
  • Thiamine tablets are usually taken once a day. Doses of 25-100 mg are sufficient to prevent mild deficiency. You can take the tablets at whatever time of day you find easiest to remember, either before or after meals. If you have been prescribed a higher dose (200-300 mg daily), your doctor will recommend that you take this as one tablet (100 mg) two or three times a day.
  • Do not take more than the dose which has been recommended or prescribed.
  • It is likely that your doctor will give you some lifestyle and dietary advice. It is important you follow any recommendations you are given about eating a well-balanced diet and not drinking alcohol.

Thiamine is unlikely to cause any side-effects at the recommended doses. If, however, you experience any symptoms which you think may be due to the tablets, please speak with your doctor or pharmacist for further advice.

  • Keep all medicines out of the reach and sight of children.
  • Store in a cool, dry place, away from direct heat and light.

If you are having an operation or dental treatment, tell the person carrying out the treatment which medicines you are taking.

Never take more than the prescribed dose. If you suspect that you or someone else might have taken an overdose of this medicine, go to the accident and emergency department of your local hospital for advice. Take the container with you, even if it is empty.

This medicine is for you. Do not give it to other people even if their condition appears to be the same as yours.

Do not keep out-of-date or unwanted medicines. Take them to your local pharmacy which will dispose of them for you.

If you have any questions about the medicine ask your pharmacist.

Further reading & references

  • British National Formulary; 69th Edition (Mar 2015) British Medical Association and Royal Pharmaceutical Society of Great Britain, London

Disclaimer: This article is for information only and should not be used for the diagnosis or treatment of medical conditions. EMIS has used all reasonable care in compiling the information but make no warranty as to its accuracy. Consult a doctor or other health care professional for diagnosis and treatment of medical conditions. For details see our conditions.

Original Author:
Helen Allen
Current Version:
Peer Reviewer:
Dr John Cox
Document ID:
3632 (v24)
Last Checked:
Next Review:
The Information Standard - certified member

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