To take biotin, consult a doctor or a trained health supplement specialist if you intend to take the vitamin in the form of herbal supplements, and take the appropriate dosage according to the package instructions or as recommended by a health care professional, advises Drugs.com. Avoid taking additional biotin if you missed a dose, and store the supplement at room temperature without exposure to heat and moisture.
Follow your doctor's recommendations regarding food, beverage or activity restrictions, and inquire about how biotin interacts with certain vitamins, supplements or medications, particularly primidone, phenytoin, phenobarbital or carbamazepine, suggests Drugs.com. Your biotin dosage may differ from normal if you have kidney disease, if you went through stomach surgery, or if you smoke. Avoid taking the supplement if you're pregnant or breastfeeding.
Seek medical attention immediately if you experience facial, tongue or throat swelling, breathing trouble, or hives, which indicate an allergic reaction, notes Drugs.com. Additionally, ask your doctor about typical side effects, such as moderate skin rash and an upset stomach.
It usually takes three to six months for the benefits of biotin to manifest, especially improvement of the hair and nails, reports Drugs.com. However, the U.S. Food and Drug Administration has not approved the use of biotin for medicinal purposes, and the supplement has not been proven effective in treating particular conditions, as of 2016.