Thiamine, a brand name for a formulation containing essential Thiamine, is widely used for various health benefits. This guide provides comprehensive information on the uses, dosage, side effects, and mechanism of action of Thiamine, as well as insights into how long it takes to work. Understanding these aspects can help you make informed decisions about its use and effectiveness.


Thiamine, also known as Vitamin B1, is a water-soluble vitamin that plays an important role in energy metabolism, glucose and fatty acid metabolism, and neuronal function. It can be found in many animal foods, as well as certain plants, and is available as a dietary supplement. Thiamine has been used as a treatment for thiamine deficiency in adults and children, and to prevent and treat conditions related to thiamine deficiency, such as beriberi, Wernicke-Korsakoff syndrome, peripheral neuropathy, and encephalopathy.

Uses for Thiamine

Thiamine is used to treat and prevent thiamine deficiency and can be beneficial in the management of conditions associated with thiamine deficiency, such as beriberi, Wernicke-Korsakoff syndrome, peripheral neuropathy, and encephalopathy. It may also be used to improve cognitive function, reduce fatigue, and increase energy levels. Additionally, thiamine is often used to treat alcohol-related neuropathy.

Mechanism of Action

The body uses thiamine in the form of thiamine pyrophosphate as a coenzyme to facilitate numerous metabolic pathways, including those involved in glucose and fatty acid metabolism, and neuronal functioning. Deficiencies in thiamine may lead to a variety of symptoms, as the body is unable to adequately metabolize glucose or fatty acids for energy, or to properly function the nervous system.

How Long Does it Take to Work?

The time it takes for thiamine to take effect depends on the severity of the condition being treated and the individual's response to the medication. In the case of thiamine deficiency, it may take several days to several weeks for symptoms to improve.


Thiamine is readily absorbed from the small intestine. It is transported to the liver via the portal vein and is then redistributed to other tissues, primarily the heart and skeletal muscles, where it is stored.

Route of Elimination

Thiamine is eliminated primarily through the kidneys, with minor amounts eliminated via the gastrointestinal tract.


The recommended dosage of thiamine is based on the patient's age, weight, and medical condition. Generally, for adults, the recommended daily dose of thiamine is 15 to 25 mg, with a maximum daily dose of 100 mg. For children, the recommended dosage is 1.2 mg per day for infants 4 to 6 months old, 1.5 mg per day for infants 7 to 12 months old, and 1.7 to 2.1 mg per day for children 1 to 18 years old.


Thiamine is usually taken orally in pill form, but can also be administered intravenously. For optimal absorption, it should be taken on an empty stomach.

Side Effects

The most common side effects of thiamine are nausea, abdominal discomfort, and headaches. Other side effects include rash, anemia, and dizziness.

Toxicity, Precaution, and Interactions

Thiamine is generally well tolerated and is not known to be toxic in excess doses, however, excessive amounts may cause an increase in urination or increase in heart rate. It is important to consult with your physician or healthcare provider before taking thiamine to ensure you are taking the appropriate dose. Additionally, thiamine may interact with other medications, such as antacids, which can limit its absorption. It may also interact with certain diseases and foods. Therefore, it is important to discuss your current medications, other conditions, and dietary habits with your healthcare provider before starting thiamine.

Disease Interactions

Patients with kidney and liver diseases should use thiamine with caution and should be monitored closely by their healthcare provider. Additionally, thiamine may be less effective in patients with kidney disease due to an impaired ability to process and eliminate the vitamin.

Drug Interactions

Thiamine may interact with some medications, including but not limited to antacids, certain antibiotics, and some diuretics and anticonvulsants. It is important to inform your healthcare provider of any medications, over-the-counter drugs, herbs, and supplements you are taking before taking thiamine.

Food Interactions

Some foods may interact with thiamine, such as coffee, tea, and other caffeine containing beverages, which can decrease the absorption of thiamine. Additionally, some foods, such as sorghum and a few grains, may interfere with thiamine absorption.

Pregnancy and Lactation Use

Thiamine should be used with caution in pregnant women, as the safety of thiamine use during pregnancy has not been established. It may be used in breastfeeding women, but should be used with caution and only in recommended amounts. It is important to consult with your healthcare provider before taking thiamine if you are pregnant or breastfeeding.

Acute Overdose

There have been no reported instances of adverse reactions due to overdoses of thiamine. However, if an overdose is suspected, it is important to seek medical attention immediately.


Thiamine should not be used in patients who are hypersensitive to thiamine, or any other ingredient found in the medication. Additionally, thiamine should not be used in patients with anorexia nervosa or bulimia.

Direction for Use

Thiamine should be taken as exactly as directed on the label or as directed by your healthcare provider. It should be taken on an empty stomach for optimal absorption.

Storage Condition

Thiamine should be stored at room temperature, between 15 to 25 degrees Celsius, and away from moisture or heat. It should be stored away from children and pets.

Volume of Distribution

The volume of distribution for thiamine is approximately 0.5 L/kg, indicating that it distributes predominantly in the extracellular fluid.


The half-life of thiamine is approximately 3-5 hours.


The clearance of thiamine is approximately 0.5 to 1.25 mL/kg/min, indicating that it is predominately eliminated via the kidneys.

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