Thiamine is vitamin B1. Vitamins are naturally occurring substances necessary for many
processes in the body. Thiamine is important in the breakdown of carbohydrates (sugars) in the
foods we eat into products needed by the body.
Thiamine is used to prevent and to treat deficiencies of thiamine.
Thiamine may also be used for purposes other than those listed in this medication guide.
What should I discuss with my healthcare provider before taking thiamine (vitamin B1)?
Before taking thiamine, talk to your doctor, pharmacist, or health care professional if you
have any other medical conditions, allergies, or if you take other medicines or other herbal/health
supplements.
Thiamine is in the FDA pregnancy category A. This means that thiamine is
considered to be safe for use during pregnancy. Talk to your doctor before taking thiamine if you
are pregnant.
It is not known whether thiamine passes into breast milk. Do not take thiamine
without first talking to your doctor if you are breast-feeding.
How should I take thiamine (vitamin B1)?
Take thiamine exactly as directed by your doctor. If you do not understand these
directions, ask your pharmacist, nurse, or doctor to explain them to you.
Take each dose with a full glass of water.
Do not take more thiamine than is prescribed for you or than is directed on the
package.
Store thiamine at room temperature away from moisture and heat.
What happens if I miss a dose of thiamine (vitamin B1)?
Take the missed dose as soon as you remember. However, if it is almost time for the next
dose, skip the missed dose and take only the next regularly scheduled dose. Do not take a double
dose.
Where can I get more information about thiamine (vitamin B1)?
Your pharmacist has information about thiamine (vitamin B1) written for health professionals that you may read.
What are the possible side effects of thiamine (vitamin B1)?
Stop taking thiamine and seek emergency medical attention if you experience an
allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face;
or hives).
Other side effects may also occur. Talk to your doctor if you experience
a feeling of warmth;
itching or hives;
weakness;
sweating;
nausea; and
restlessness.
Side effects other than those listed here may also occur. Talk to your
doctor about any side effect that seems unusual or that is especially bothersome. You may report side effects to FDA at 1-800-FDA-1088.
What is the most important information I should know about thiamine (vitamin B1)?
Do not take more thiamine than is prescribed for you or than is directed on the
package.
What should I avoid while taking thiamine (vitamin B1)?
There are no restrictions on food, beverages, or activities while taking thiamine unless
otherwise directed by your doctor.
What other drugs will affect thiamine (vitamin B1)?
It is not known whether other drugs will interact with thiamine. Talk to your doctor and
pharmacist before taking any prescription or over-the-counter medicines or herbal/health
supplements.
What happens if I have an overdose of thiamine (vitamin B1)?
Remember, keep this and all other medicines out of the reach of children, never share
your medicines with others, and use this medication only for the indication prescribed.
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up-to-date, and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. Multum
information has been compiled for use by healthcare practitioners and consumers in the United States and therefore Multum does not
warrant that uses outside of the United States are appropriate, unless specifically indicated otherwise. Multum's drug information does
not endorse drugs, diagnose patients or recommend therapy. Multum's drug information is an informational resource designed to assist
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given patient. Multum does not assume any responsibility for any aspect of healthcare administered with the aid of information
Multum provides. The information contained herein is not intended to cover all possible uses, directions, precautions, warnings, drug
interactions, allergic reactions, or adverse effects. If you have questions about the drugs you are taking, check with your doctor, nurse
or pharmacist.
Content provided by Multum - Last Updated 11/10/2009