B vitamins include thiamine, riboflavin, niacin / niacinamide, vitamin B6, vitamin B12, folic acid, and pantothenic acid. Some brands of B vitamins also contain ingredients such as vitamin C, vitamin E, biotin, or zinc. Consult your doctor or pharmacist if you have questions about the ingredients in your brand.

Most of the B vitamins have been recognized as coenzymes (substances that participate with enzymes in accelerating the interconversion of chemical compounds), and they all appear to be essential in facilitating the metabolic processes of all forms of animal life.

There is no toxic dose established in humans. However, at doses higher than 50 mg per day, some side effects such as skin flushing can occur. Therapeutic doses of 1500 to 1600 mg per day can be given, but with a risk of liver toxicity, especially in the presence of pre-existing liver disease.

There are a variety of symptoms that come with a B12 deficiency. One sign associated with the condition is experiencing heart palpitations.

Vitamin B-50 Complex Tablet, Extended Release. This product is a combination of B vitamins used to treat or prevent vitamin deficiency due to poor diet, certain illnesses, alcoholism, or during pregnancy. Vitamins are important building blocks of the body and help keep you in good health.

Mild upset stomach or flushing may occur. These effects are usually temporary and may disappear as your body adjusts to this product. If any of these effects persist or worsen, contact your doctor or pharmacist promptly.

Some products that may interact with this drug are: altretamine, cisplatin, certain antibiotics (e.g., chloramphenicol), certain anti- seizure drugs (e.g., phenytoin), levodopa, other vitamin/nutritional supplements.