Anthralin can be irritating to the skin and can cause temporary, brownish discoloration of the treated skin. By using short treatment times, skin irritation and skin staining are reduced without decreasing effectiveness. Care must be taken not to get anthralin in the eyes. Hands must be washed after applying. Cortisone pills are sometimes given for extensive scalp hair loss.
Cortisone taken internally is much stronger than local injections of cortisone into the skin.
It is necessary to discuss possible side effects of cortisone pills with your physician. Healthy young adults often tolerate cortisone pills with few side effects. In general, however, cortisone pills are used in relatively few patients with alopecia areata due to health risks from prolonged use. Also, regrown hair is likely to fall out when the cortisone pills are stopped. See previous explanation under mild, patchy alopecia areata.