Thiamine (Vitamin B1) 100 mg: uses, price & cheaper substitutes
Common uses: Thiamine deficiency or low intake, as advised by a doctor; People at higher risk of deficiency – those who are dependent on alcohol, older adults, people with diabetes or problems absorbing food, or after weight-loss surgery.
Listed MRPs range from ₹3.44 to ₹4.70 per tablet across 5 listings.
Price comparison
| Brand | Manufacturer | Pack | MRP | ₹ / tablet | As on |
|---|---|---|---|---|---|
| HealthVit Vitamin B1 100 mg | West-Coast Pharmaceutical Works Ltd | 60 | ₹206.25 | ₹3.44 | 19 October 2026 |
| Thiameal ADD 100 | Steris Healthcare Pvt Ltd | 10 | ₹42.19 | ₹4.22 | 19 October 2026 |
| amiNTOZ 100 | Linux Laboratories | 10 | ₹43.22 | ₹4.32 | 19 October 2026 |
| Thiarone | Medzelon Pharmaceutical Pvt. Ltd. | 10 | ₹45.94 | ₹4.59 | 19 October 2026 |
| Thiaplex 100 | Leeford Healthcare Ltd | 10 | ₹47.00 | ₹4.70 | 19 October 2026 |
MRPs as printed/listed on the date shown; actual price may vary.
Uses
- Thiamine deficiency or low intake, as advised by a doctor.
- People at higher risk of deficiency – those who are dependent on alcohol, older adults, people with diabetes or problems absorbing food, or after weight-loss surgery.
- As part of treatment your doctor prescribes for conditions linked to low thiamine.
How to take it
Take one tablet a day, or as your doctor advises, with water. Thiamine is usually taken once to three times a day depending on the product and why it is needed. The NHS says taking 100 mg or less a day of thiamine from supplements is unlikely to cause harm; take higher amounts only if a doctor prescribes them. Thiamine is not stored in the body, so you need it regularly. If you drink heavily, tell your doctor – thiamine is often prescribed, but cutting down alcohol matters most. Severe thiamine deficiency can cause brain damage (Wernicke disease or Korsakoff syndrome), so see a doctor urgently if someone who drinks heavily becomes confused or forgetful.
Side effects
Common
- Nausea.
- Sweating or flushing.
- Restlessness or weakness.
Serious
Stop and get medical help urgently if you notice any of these.
- Allergic reaction – hives, itching, swelling or difficulty breathing.
- Confusion or memory loss in heavy drinkers – severe thiamine deficiency can damage the brain; needs urgent medical care, not just tablets.
- Any severe or persistent new symptom – tell your doctor.
Safety information
Alcohol
Heavy drinking is a major cause of thiamine deficiency. Tell your doctor if you drink; reducing alcohol is essential.
Pregnancy
Tell your doctor if you are pregnant or breastfeeding before taking high-dose thiamine.
Kidney problems
Tell your doctor if you are on dialysis.
Liver problems
Tell your doctor if you have liver disease.
Children
100 mg tablets are not for children unless a doctor prescribes them.
Missed dose
Take it when you remember unless the next dose is nearly due; do not double up.
Interactions
- Other B-complex or multivitamin products – check the total thiamine.
- Alcohol – reduces thiamine absorption and stores.
- Prescription medicines – tell your doctor and pharmacist about everything you take.
Frequently asked questions
Thiamine 100 mg tablet uses
Thiamine 100 mg is used to prevent or treat low vitamin B1, especially in people who drink heavily, older adults, people with diabetes or absorption problems, and after weight-loss surgery.
Why is thiamine given to alcoholics?
People who are dependent on alcohol are at high risk of thiamine deficiency, which can damage the brain and nerves. Doctors often prescribe thiamine, but reducing alcohol is essential.
Is thiamine 100 mg safe daily?
The NHS says 100 mg or less a day of thiamine from supplements is unlikely to cause harm. Take more only if your doctor prescribes it.
Thiamine side effects
Side effects are uncommon. Some people get nausea, sweating, flushing, restlessness or weakness. Stop and get help for hives, swelling or breathing difficulty.
Thiamine before or after food?
It can be taken with or without food. Take it at the same time each day.
What are the signs of thiamine deficiency?
Thiamine deficiency can lead to beriberi, and severe deficiency can cause brain damage (Wernicke disease and Korsakoff syndrome). It is most often seen in people who drink too much alcohol. Severe symptoms need urgent medical care.
Can I take thiamine with B-complex tablets?
Usually yes, but check the total thiamine and ask your doctor if you are taking several products.
Thiamine vs benfotiamine – what is the difference?
Both provide vitamin B1. Thiamine is the standard form; benfotiamine is a different form found in some combination products. Your doctor can advise which you need.
Sources
- MedlinePlus – Thiamine (vitamin B1) (19 October 2026)
- NHS – B vitamins and folic acid (19 October 2026)
- MedlinePlus – Thiamin (19 October 2026)
- NPPA Pharma Sahi Daam (ceiling prices) (19 October 2026)
- PMBI Jan Aushadhi Product & MRP List (19 October 2026)
Medyzen Editorial Team · Last updated
This page is general information, not medical advice. Do not start, stop or change a medicine without asking a doctor or pharmacist. Terms