Thiamine - Vitamin B1
Athiam, ThiaDose, ThiamEss
Revisado por pares por Sid DajaniÚltima actualización por Michael Stewart, MRPharmSLast updated 12 Nov 2024
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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.
At a glance
Thiamine is vitamin B1 and is used to treat or prevent thiamine deficiency.
It is available as tablets, modified-release tablets, and oral liquid medicine.
You can take it at any time of day, with or without food.
It is unlikely to cause side-effects at recommended doses.
Tell your doctor if you are pregnant, breastfeeding, or have had an allergic reaction to medicine.
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Video picks for Suplementos de vitaminas y minerales
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About thiamine
Tipo de medicamento | Vitamin B1 |
Usado para | Thiamine deficiency |
También llamado | Athiam®; ThiaDose®; ThiamEss® |
Disponible como | Tablets, modified-release tablets, oral liquid medicine |
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.
Before taking thiamine
Volver al contenidoTo 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 breastfeeding. This is because, while you are expecting or feeding a baby, you should only take medicines on the recommendation of a doctor.
Si alguna vez has tenido una reacción alérgica a un medicamento.
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How to take thiamine
Volver al contenidoBefore 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.
Obteniendo el máximo de tu tratamiento
Volver al contenidoIt 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.
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Can thiamine cause problems?
Volver al contenidoThiamine 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.
How to store thiamine
Volver al contenidoMantenga todos los medicamentos fuera del alcance y la vista de los niños.
Almacenar en un lugar fresco y seco, lejos del calor y la luz directos.
Información importante sobre todos los medicamentos
Volver al contenidoInformación importante sobre todos los medicamentos
Si vas a someterte a una operación o tratamiento dental, informa a la persona que realiza el tratamiento sobre los medicamentos que estás tomando.
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.
Este medicamento es para ti. No lo des a otras personas, incluso si su condición parece ser la misma que la tuya.
No guardes medicamentos caducados o no deseados. Llévalos a tu farmacia local, que se encargará de desecharlos por ti.
If you have any questions about the medicine ask your pharmacist.
Informar efectos secundarios de un medicamento o vacuna
Si experimenta efectos secundarios, puede reportarlos en línea a través de Yellow Card website.

¿Inseguro sobre mezclar medicamentos?
Verifica posibles interacciones entre medicamentos, suplementos y alimentos antes de tomarlos juntos.
Preguntas frecuentes
What is thiamine, and why is it important?
Thiamine is a fundamental type of vitamin B, specifically known as vitamin B1. It is essential for normal bodily functions, and while deficiencies are uncommon in the UK, your doctor might suggest a supplement if your usual diet doesn't supply enough.
Which everyday foods naturally contain thiamine?
Good natural sources of thiamine include various everyday foods such as cereals, nuts, peas, beans, and pork. Incorporating these into your diet can help ensure you get sufficient vitamin B1.
Who should discuss thiamine supplementation with a doctor before taking it?
You should speak with a doctor or pharmacist before taking thiamine if you are pregnant or breastfeeding, or if you have previously had an allergic reaction to any medicine. This ensures the treatment is appropriate and safe for your specific circumstances.
Does thiamine need to be taken with food, or at a specific time of day?
Thiamine tablets can be taken at any time of day that you find most convenient to remember, either before or after your meals. The instructions provided with your medicine will confirm this, but generally, there's no strict requirement to take it with food.
What should I do if I think I've taken too much thiamine?
If you suspect that you or someone else might have taken an overdose of thiamine, you should immediately go to the accident and emergency department of your local hospital for advice. Remember to take the medicine container with you, even if it is empty.
Lecturas adicionales y referencias
- Manufacturer's PIL, Thiamine hydrochloride 100 mg tablets; Flamingo Pharma (UK) Ltd, The electronic Medicines Compendium. Dated March 2020.
- Medicamentos Completos BNF 89ª Edición; Asociación Médica Británica y Sociedad Real de Farmacia de Gran Bretaña, Londres.
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About the authorView full bio

Michael Stewart, MRPharmS
Medicine Leaflet Review Manager – Contractor, Pharmacist
BPharm (Hons), MRPharmS
Michael is a community pharmacist practicing in the Midlands and South Yorkshire with more than 20 years’ experience advising on medicines and medical conditions. He has a strong background in healthcare training, having produced and delivered training courses for pharmacy teams and staff of residential care settings, including nurses. He has also contributed to pharmacy advisory boards for the management of low acuity conditions in the community.
About the reviewer

Sid Dajani
Sultan Dajani qualified at the London School of Pharmacy in 1994 and became the youngest elected member of the Royal Pharmaceutical Society council since its founding in 1842.
Historial del artículo
La información en esta página está escrita y revisada por pares por clínicos calificados.
Próxima revisión: 11 Nov 2027
12 Nov 2024 | Última versión

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