Intraoperative nitrofurazone vas injection has been utilized to hasten sterility in the immediate postoperative period. Clinically 100 outpatient vasectomies were performed in which nitrofurazone was utilized in a 1 mg. per milliliter concentration to irrigate the distal (penile) vas segment resulting in early attainment of azoospermia postoperatively in 90 per cent of the patients.