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.
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.