All medications have side effects. Hives, constipation, dry mouth, and headaches are common side effects in a lot of drugs. But in some cases certain side effect combinations can indicate an allergic reaction instead of being a side effect. Be sure to read the specific warnings on the drug to be sure.
Vitamin A. Vitamin A will help your hair and skin health. This antioxidant vitamin helps normalize cell growth, maintain healthy skin, form collagen and increase your cell renewal rate, according to the National Institutes of Health.
Vitamins C, E and A are important for the health of the skin and hair. They increase the health and efficiency of the entire body, thereby freeing up the resources to feed your hair the nutrients it needs on a daily basis. They help promote healthy connective tissues and cellular growth.