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.
Dry skin vitamins mainly include Vitamin A, Vitamin B, Vitamin C and Vitamin D. The skin looks dry if the body has low levels of Vitamin A and Vitamin B. Leafy vegetables, and fortified vitamins help in reloading these vitamins in the body.