Vitamin B1

In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.

You should not use thiamine if you have ever had an allergic reaction to it.

Ask a doctor or pharmacist before taking thiamine if you have any medical conditions, if you take other medications or herbal products, or if you are allergic to any drugs or foods.

Before you receive injectable thiamine, tell your doctor if you have kidney disease.

Thiamine is only part of a complete program of treatment that may also include a special diet. It is very important to follow the diet plan created for you by your doctor or nutrition counselor. You should become very familiar with the list of foods you should eat or avoid to help control your condition.

You should not use thiamine if you have ever had an allergic reaction to it.

Ask a doctor or pharmacist if it is safe for you to take this medicine if:

• you have any other medical conditions;

• you take other medications or herbal products; or

• you are allergic to any drugs or foods.

To make sure you can safely receive injectable thiamine, tell your doctor if you have kidney disease.

Thiamine is not expected to harm an unborn baby. Your thiamine dose needs may be different during pregnancy. Do not take thiamine without medical advice if you are pregnant or plan to become pregnant.

It is not known whether thiamine passes into breast milk. Your dose needs may be different while you are nursing. Do not take thiamine without medical advice if you are breast-feeding a baby.

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

• blue colored lips;

• chest pain, feeling short of breath;

• black, bloody, or tarry stools; or

• coughing up blood or vomit that looks like coffee grounds.

Less serious side effects may include:

• nausea, tight feeling in your throat;

• sweating, feeling warm;

• mild rash or itching;

• feeling restless; or

• tenderness or a hard lump where a thiamine injection was given.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Applies to thiamine: capsule, solution, tablet, tablet enteric coated

Along with its needed effects, thiamine (the active ingredient contained in Vitamin B1) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking thiamine:

• Coughing
• difficulty in swallowing
• hives
• itching of skin
• swelling of face, lips, or eyelids
• wheezing or difficulty in breathing

Applies to thiamine: compounding powder, injectable solution, oral tablet

Local

Local side effects have included tenderness and induration at the injection site following intramuscular use.[Ref]

Hypersensitivity

Hypersensitivity side effects have included a feeling of warmth, pruritus, urticaria, weakness, sweating, nausea, restlessness, tightness of the throat, angioneurotic edema, cyanosis, pulmonary edema, and hemorrhage into the gastrointestinal tract. Anaphylaxis has been reported, especially after repeated injection. Collapse and death have also been reported.[Ref]

Some side effects of Vitamin B1 may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.