Thiamine - oral
Thiamine - oral
Thiamine (vitamin B1) is used to prevent or treat low levels of vitamin B1 in people who do not get enough of the vitamin from their diets. Most people who eat a normal diet do not need extra vitamin B1. However, some conditions (such as alcoholism, cirrhosis, stomach/intestinal problems) can cause low levels of vitamin B1. Vitamin B1 plays an important role in the body. It is needed to maintain the health of the nerves and the heart. Low levels of vitamin B1 may cause heart failure and mental/nerve problems.
Take this vitamin by mouth with or without food, usually 1 to 3 times daily. Follow all directions on the product package, or take as directed by your doctor. If you have any questions, ask your doctor or pharmacist.
The dosage is based on your medical condition and response to treatment.
Use this vitamin regularly to get the most benefit from it. To help you remember, take it at the same time(s) each day.
Tell your doctor if your condition lasts or gets worse. If you think you may have a serious medical problem, get medical help right away.
This vitamin usually has no side effects. If you have any unusual effects, contact your doctor or pharmacist promptly.
A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including:
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
In the US -
Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088 or at www.fda.gov/medwatch.
In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.
Before taking thiamine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.
Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).
During pregnancy, this vitamin has been found to be safe when used in recommended doses. Higher doses during pregnancy should be used only when clearly needed. Discuss the risks and benefits with your doctor.
This vitamin passes into breast milk and is considered to be safe during breast-feeding when used in recommended doses. Consult your doctor for more information.
Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. Keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.
This vitamin may interfere with certain lab tests (such as uric acid levels, urobilinogen urine test), possibly causing false test results. Make sure lab personnel and all your doctors know you use this vitamin.
If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.
Lab and/or medical tests (such as thiamine levels) may be done while you are using this medication. Keep all medical and lab appointments. Consult your doctor for more details.
This product is not a substitute for a proper diet. It is best to get your vitamins from healthy foods. Thiamine is commonly found in cereal grains, bread, pork, and beans, among others. Consult your doctor, pharmacist, or nutritionist for more details.
If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Take your next dose at the regular time. Do not double the dose to catch up.
Different brands of this vitamin have different storage needs. Check the product package for instructions on how to store your brand, or ask your pharmacist. Do not store in the bathroom. Keep all medications away from children and pets.
Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.
HOW TO USE THIS INFORMATION: This is a summary and does NOT have all possible information about this product. This information does not assure that this product is safe, effective, or appropriate for you. This information is not individual medical advice and does not substitute for the advice of your health care professional. Always ask your health care professional for complete information about this product and your specific health needs.
Information last revised August 2023.
Copyright(c) 2023 First Databank, Inc.
Selected from NATIONAL DRUG DATA FILE (NDDF) data included with permission and copyrighted by First Databank, Inc., 2019. This copyrighted material has been downloaded from a licensed data provider.
The above information is intended to supplement, not substitute for, the expertise and judgment of your health care professional. You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment.