Thirty-six patients were treated for single or multiple warts by intralesional injection of bleomycin sulfate (Blenoxane) at the base of the wart. The dose varied according to the size of the lesion and ranged from 0.2 to 0.8 mg per injection, up to a maximum total dose of 2 mg. The cure rates were as follows: 67 percent in plantar warts; 82 percent in ungual warts; and 80 percent in warts located elsewhere. The cure rate for all patients was 75 percent. The drug was well tolerated and the procedure readily accepted by the patients.