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.
Dietary supplements are available for people with vitamin B6 deficiency, which is rare in the United States. Other Vitamins. The American Skin Association lists other vitamins that may help improve skin. These vitamins include vitamin A, riboflavin, vitamin C and vitamin D.