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Vitamin B1 tablets 100 mg – patient leaflet, side effects, dosage

Last updated: · Text from the MHRA, as of · About this document

Medicine strength:
100 mg
Contains active substance:
Similar medicines:

Patient leaflet - Vitamin B1 tablets 100 mg

1. What Vitamin B1 Tablets are and what they are used for

These tablets are vitamin tablets which

contain thiamine hydrochloride as the

active substance. They are used to treat

thiamine deficiency (when your body does

not have enough of the vitamin).

Even though thiamine is found naturally in many foods, sometimes your body requires a supplement. This may be because your diet does not contain enough thiamine or you may not be absorbing it from your diet effectively. You may also have a special need for extra thiamine, especially if you are excreting it quickly from your body (e.g. in your urine).

2. What you need to know before you take Vitamin B1 Tablets

Do not take Vitamin B1 Tablets:

Ÿ if you are allergic to thiamine

hydrochloride or any of the other ingredients of this medicine (listed in section 6).

Other medicines and Vitamin B1 Tablets

Tell your doctor or pharmacist if you are taking, have recently taken or might take any other medicines, especially:

Ÿ thiosemicarbazones such as metisazone

(used to treat viral infections)

Ÿ fluorouracil used to treat cancer.

Pregnancy, breast-feeding and fertility

Do not take this medicine if you are pregnant

or breast-feeding, think you may be pregnant or are planning to have a baby. Ask your doctor or pharmacist for advice before taking this medicine.

Driving and using machines

This medicine is not known to affect the ability to drive or use machines. However, if you feel you may be affected, do not drive or use machines and speak to your doctor.

Tests

This medicine can affect certain medical tests.

If you are having a blood test, scan or any other medical test, tell your doctor that you are taking

Vitamin B1 Tablets.

Vitamin B1 Tablets contain lactose

If you have been told by your doctor that you

have an intolerance to some sugars, contact

your doctor before taking this medicine.

3. How to take Vitamin B1 Tablets

Always take this medicine exactly as described in this leaflet or as your doctor or pharmacist has told you. Check with your doctor or pharmacist if you are not sure. Vitamin B#1 Tablets

Vitamin B#1

Tablets

What Vitamin B1 Tablets look like and contents of the pack

Vitamin B1 Tablets are white biconvex round tablets, plain on both sides.

Vitamin B1 Tablets are available in packs containing 1000 tablets.

Marketing Authorisation Holder

Ennogen IP Ltd, Unit G4, Riverside Industrial Estate, Riverside Way, Dartford, DA1 5BS, UK.

Manufacturer

NBTY Europe Ltd, Vitality House, Sixth Avenue, Centrum 100, Burton Upon Trent, DE14 2WP, United Kingdom.

This leaflet was last revised in March 2023.

100 mg

Vitamin B1

Tablets

(Thiamine

Hydrochloride)

1000 tablets

For the treatment of thiamine deficiency.

Each tablet contains 100mg of thiamine hydrochloride. Also contains lactose. See leaflet for further information.

For oral use. Swallow the tablets with water.

Adults and children over 12 years:

Mild deficiency: 1 tablet once a day.

Severe deficiency: 1 tablet 2-3 times a day.

Should not be used in children under 12 years of age. Read the package leaflet before use.

Keep out of the sight and reach of children.

Store in a closed container in a dry place protected from light. PL 55612/0059

The recommended dose is:

Adults and children over 12 years of age

Mild deficiency: 1 tablet once a day. Severe deficiency: 1 tablet 2-3 times a day.

The tablets can be taken as long as symptoms persist or a dietary supplement is required, follow the recommendation of your doctor or pharmacist. If your condition does not improve, tell your doctor.

Children under 12 years of age

Not recommended.

If you take more Vitamin B1 Tablets than you should

This is unlikely to be harmful, but if you have taken too many tablets, tell your doctor or pharmacist immediately or contact your nearest emergency department.

If you forget to take Vitamin B1 Tablets

Take your dose as soon as you remember, then carry on taking your tablets as usual. Do not take a double dose to make up for a forgotten dose.

If you have any further questions on the use of this medicine, ask your doctor or

pharmacist.

4. Possible side effects

Like all medicines, this medicine can

cause side effects, although not everybody

gets them.

Stop taking the tablets and tell your doctor immediately if you notice any of the following:

GSL

Vitamin B#1 Tablets

Page 9 Page 10

Ÿ itching, hives, swelling of the face or

throat, stomach pain, difficulty breathing or swallowing, faster heartbeat, feeling your heartbeat, shock. These may be symptoms of an allergic reaction.

The following side effects have also been

reported:

Not known (frequency cannot be estimated

from the available data):

Ÿ feeling or being sick, diarrhoea, stomach

pain.

Reporting of side effects

If you get any side effects, talk to your doctor,

pharmacist or nurse. This includes any possible

side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme at: www.mhra.gov.uk/yellowcard or search for MHRA Yellow Card in the Google Play or Apple App Store. By reporting side effects you can help provide more information on the safety of this medicine.

5. How to store Vitamin B1 Tablets

Keep this medicine out of the sight and reach of children.

Do not use this medicine after the expiry date which is stated on the label. The expiry date refers to the last day of that month.

Store in a closed container in a dry place protected from light.

Do not throw away any medicines via

wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.

6. Contents of the pack and other

information

What Vitamin B1 Tablets contain

The active substance is thiamine hydrochloride. Each tablet contains 100mg of thiamine hydrochloride.

The other ingredients are lactose, calcium phosphate, maize starch, potato starch, stearic acid, magnesium stearate, feculose solids (consisting of maize starch, sodium starch glycolate, a combination of Nipa esters, mains water).

Page 11 Page 12

Marketing Authorisation Holder: Ennogen IP Ltd, Unit G4, Riverside Industrial Estate, Riverside Way, Dartford, DA1 5BS, UK.

Customer

Description

Market

Language

Version No.

Date

Ennogen

Vitamin B1 Leaflegt Label

UK

English

630 x 32mm

8 pt

1

10-03-23

Unvarnish area Braille

e-mail : artwerkcd@gmail.com

prasad.pdp@gmail.com

Ph : +91-9845156610

About this document

Source: MHRA - Medicines and Healthcare products Regulatory Agency (products.mhra.gov.uk) · Marketing authorisation: PL 55612/0059

Last revision stated in the text: March 2023 · MHRA data as of 13 October 2026

Found a mistake? Tell us on the contact page.

The information on this site does not replace the advice of a doctor or pharmacist.

Facts about Vitamin B1 tablets 100 mg

Active substance Thiamine hydrochloride
Strength 100 mg
Pharmaceutical form White, bi-convex, round tablet, plain on both sides.
Excipients Calcium Phosphate, Lactose, Maize Starch, Potato Starch, Stearic Acid, Magnesium Stearate, Feculose Solids, Feculose, Sodium Starch Glycollate, Nipa Esters Combination, Mains Water
Shelf life 36 months.
Storage In well closed containers in a dry place protected from light.
Drug group (ATC) Vitamin B1, Plain
  1. A Alimentary tract and metabolism drugs
    1. A11 Vitamins
      1. A11D Vitamin B1, plain and in combination with vitamin B6 and B12
        1. A11DA Vitamin B1, plain
          1. A11DA01 thiamine (vit B1)
Marketing authorisation PL 55612/0059 (first authorised 18 August 2025)
Marketing authorisation holder Ennogen IP Ltd

Sources: the MHRA product information (products.mhra.gov.uk). Contains public sector information licensed under the Open Government Licence v3.0.