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.
Hair vitamins can be used to promote faster growing, healthier hair. A healthy body is the ideal environment for healthy hair to thrive; a strong metabolism and immune system are key factors for growing healthy hair fast. The following specific vitamins promote faster hair growth:1  Biotin promotes cell growth, the production of fatty acids, and the metabolism of fats and amino acids. 2  Niacin (Vitamin B3) promotes scalp circulation. 3  Pantothenic Acid (Vitamin B5) prevents hair loss. Niacin (Vitamin B3) promotes scalp circulation. 2  Pantothenic Acid (Vitamin B5) prevents hair loss. 3  Vitamin A is an antioxidant that helps produce healthy sebum in the scalp. 4  MSM lengthens the natural hair growth phase.