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 C. Vitamin C is good for your hair growth and healthy skin. Vitamin C may help your skin look younger, according to the Mayo Clinic. Vitamin C plays an essential role in forming collagen. Collagen, a protein, stimulates skin production, 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.