[Clinical experience with single and multiple subcutaneous administration of LHRH analog Buserelin (Hoe 766) in prostatic carcinoma: endocrinological study of optimum subcutaneous doses].

Seventy three patients with prostatic carcinoma (PC) and 7 patients with benign prostatic hypertrophy (BPH) in 12 institutes subcutaneously received single and multiple doses of Hoe 766, and clinical efficacy, safety and endocrine effects of drug were examined. In a single doses study, six doses were subcutaneously administered to 7 BPH and 3 with PC. Gonadotropin and testosterone levels in the blood were increased following all these doses. In a multiple study, 7 kinds of doses were given to 40 patients with PC. The optimum doses of subcutaneous injection was decided to be 500 x 3 micrograms/day based on gonadotropin and testosterone suppression. Objective response by NPCP's criteria was observed in 35.3% (complete response 5.9%, partial response 29.4%) following 3 months of Hoe 766 treatment. Adverse reactions were observed in 9 cases (12.8%): Treatment was discontinued in 3 cases (eruption in 2, nausea and vomiting in 1), and continued in 6 cases (8.6%) without any treatment required. Buserelin was thus considered to be an effective, safe drug to treat prostatic carcinoma.