Thiamine Tablet Side Effects in Pakistan

A complete guide to the side effects of Thiamine Tablet. From common effects to serious warnings — everything you need to know is on this page.

Compiled by the PakVita Editorial Team · AI-assisted drafting with editorial review · Sourced from DRAP, WHO, BNF · Last updated: 2026-07-09

Side Effects

Quick Answer

Common side effects of Thiamine Tablet include nausea and stomach upset. Serious effects such as severe allergic reaction (anaphylaxis) require immediate medical attention. Most patients tolerate Thiamine Tablet well at the correct dose. Contact your doctor if any side effect persists or worsens.

Side Effects at a Glance

Common

Nausea
Stomach upset
Mild skin rash

Serious — See a Doctor

Severe allergic reaction (anaphylaxis)
Difficulty breathing
Swelling of the face or throat

When to See a Doctor Immediately

Signs of severe allergic reaction — rash, swelling, or difficulty breathing
No improvement in symptoms after completing the prescribed course
New or worsening neurological symptoms such as confusion or unsteady gait

Thiamine Tablet Side Effects (Nuksanat)

Thiamine Tablet (Thiamine Hydrochloride / Vitamin B1) is generally safe when taken at the correct dose. However, like all medicines, it can cause side effects in some patients.

Common Side Effects (Aam Nuksanat)

Nausea
Stomach upset
Mild skin rash

These side effects are usually mild. If they continue, inform your doctor.

Serious Side Effects (Sanjeedah Nuksanat)

Severe allergic reaction (anaphylaxis) — seek emergency help immediately
Difficulty breathing — seek emergency help immediately
Swelling of the face or throat — seek emergency help immediately

When to See a Doctor (Kab Doctor Se Milna Zaroori Hai)

Signs of severe allergic reaction: rash, swelling, or difficulty breathing
No improvement in symptoms after completing the prescribed course
New or worsening neurological symptoms such as confusion or unsteady gait

Warnings and Precautions (Ihtiyat)

Do not use Thiamine Tablet if you are allergic to thiamine hydrochloride or any ingredient
Inform your doctor of all medicines you are currently taking before starting

Side Effects Summary Table

Type	Side Effect	Action
Common	Nausea	Monitor / inform doctor
Common	Stomach upset	Monitor / inform doctor
Common	Mild skin rash	Monitor / inform doctor
Serious	Severe allergic reaction	Seek emergency help immediately
Serious	Difficulty breathing	Seek emergency help immediately

Reporting Side Effects

If you notice any unexpected side effect, report it on the DRAP pharmacovigilance portal: https://www.dra.gov.pk/pharmacovigilance

The information in this guide is for educational purposes only. If you notice any side effect, contact your doctor or pharmacist.

Frequently Asked Questions

What are the most common side effects of Thiamine Tablet?

The most commonly reported side effects of Thiamine Tablet include nausea and stomach upset. These are usually mild and go away on their own. Inform your doctor if they persist.

Can Thiamine Tablet cause allergic reactions?

Yes, like all medicines, Thiamine Tablet can cause allergic reactions in some people. Signs include rash, itching, swelling, or difficulty breathing. Stop use and seek medical help immediately if this happens.

Is Thiamine Tablet safe to take for a long time?

Long-term safety of Thiamine Tablet depends on the underlying condition. Your doctor will monitor for any signs of adverse effects if continued use is needed.

What should I do if I experience side effects from Thiamine Tablet?

For mild side effects, inform your pharmacist. For serious effects such as severe allergic reaction, stop the medicine and contact your doctor immediately or go to the nearest hospital.

Does Thiamine Tablet affect the liver or kidneys?

Thiamine Tablet is generally safe for the liver and kidneys at recommended doses. Your doctor will advise based on your overall health condition.

Brand alternatives, same-class options, and other medicines used for the same conditions as Thiamine Tablet.

Other supplements and vitamins

Sibling medicines in the Supplements and Vitamins class.

All in class →

Sources

DRAP Registered Products Database — Drug Regulatory Authority of Pakistan
WHO Model List of Essential Medicines, 23rd ed. (2023) — World Health Organization
British National Formulary (BNF) — BMJ Group & Pharmaceutical Press

Medical disclaimer

This page is for educational use only and does not replace professional medical advice. Always confirm diagnosis, dose, and interactions with a qualified doctor or pharmacist before starting or changing any medicine.