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.
Overall, the entire suite of B-complex vitamins is essential for good hair and skin. In addition to Vitamin B12, vitamins B3 and B6 are also critical for hair and skin growth and appearance. A balanced B-complex vitamin supplement provides the extra boost your hair and skin may need to look great.
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.