| Thiamine HCl 100MG Tablets | MARLEX PHARMACEUTICALS | 30/$5.41 or 90/$6.77 |
What is thiamine?
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 is the price of this medication and similar alternatives?
This pricing information is subject to change at the sole discretion of DS Pharmacy. For the most current and up-to-date pricing information, please visit drugstore.com.
| Thiamine HCl 100MG Tablets | MARLEX PHARMACEUTICALS | 30/$5.41 or 90/$6.77 |
What are the possible side effects of thiamine?
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.
How should I take thiamine?
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 is the most important information I should know about thiamine?
Do not take more thiamine than is prescribed for you or than is directed on the package.
What happens if I miss a dose?
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.
What other drugs will affect thiamine?
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.
Can I take this if I am pregnant or trying to get pregnant or if I am breastfeeding?
Thiamine has been assigned to pregnancy category A (injectable) and category C (at doses above RDA) by the FDA. Animal studies have failed to reveal evidence of fetal harm. Thiamine is only recommended for use during pregnancy when benefit outweighs risk.
The recommended daily allowance (RDA) for thiamine during pregnancy is 1.4 mg/day regardless of a woman's age. Women carrying more than one fetus may have increased needs for thiamine.
There are no data on the excretion of thiamine into human milk. The manufacturer recommends that caution be used when administering thiamine to nursing women.
The recommended daily allowance (RDA) for thiamine during lactation is 1.4 mg/day regardless of a woman's age. Women who are breast-feeding more than one infant may have increased needs for thiamine.
Who should NOT use this medication?
Known sensitivity to thiamine or any ingredient in formulation.
What happens if I overdose?
Seek emergency medical attention. Symptoms of a thiamine overdose may include a feeling of warmth, weakness, sweating, nausea, restlessness, difficulty breathing, tightness of the throat, bluish colored skin, and death.
What should I discuss with my healthcare provider before taking thiamine?
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.
Can I stop taking the medication if I feel better?
As a general rule, you should always take your medications exactly as prescribed and do not change the dosage or stop taking the medication without first discussing it with your healthcare provider.
I am on so many medications; do I have to take them all?
This is called polypharmacymany different medications being used at the same time by one person. Sometimes, being on multiple medications is acceptable and appropriate but at other times it may be problematic. If you are receiving your medications from multiple physicians you need to ensure that they all know what medications you are taking. The best way to do this is to make a list of all the medications you are currently using, including all nutritional supplements, homeopathic remedies, vitamins and over-the-counter drugs (if possible, also include all the diseases you have been diagnosed with). Give a copy to every doctor who takes care of you so they have it on file, this way they can avoid duplicating medications and perhaps even try to consolidate some. After every doctor's visit remember to update the list accordingly. Also, as much as you possibly can, try to use the same pharmacy to fill all your prescriptions, this way any potential drug interactions can be caught and averted.
Where can I get more information?
More Information
![]() |
![]() |
