Abstract:Objectives To evaluate the efficacy and safety of drug castration with radiotherapy in the treatment of prostate cancer. Methods From January 2014 to January 2016, the study subjects were 89 patients who aged over 70 came to our hospital were randomly divided into two groups: drug castration with radiotherapy group (n?=?44) and radiotherapy group (n?=?45); the clinical efficacy and adverse reactions were observed and calculated by Kaplan-Meier method of follow-up observed progression-free survival. Results The comparison between objective remission rate and disease control rate in the treatment group of drug castration combined with radical radiotherapy has statistical significance (objective response rate: 61.4% VS 33.3%, P?0.05; disease control rate: 95.5% VS 55.5%, P?0.05). Kaplan-Meier method was applied to calculate follow-up observe progression-free survival (mPFS), drug castration combined with radical radiotherapy group is (36.5?±?3.7) mo, radiotherapy group is (19.8 ±?2.4) mo, and the difference was statistically significant (P?0.05); and overall survival (OS) is (39.8?±?3.8) mo in drug castration combined with radical radiotherapy group, (25.4?±?2.7) mo in radiotherapy group, the difference was statistically significant (P?0.05). Multivariate analysis found that PFS was associated with KPS scores of 70 to 80 in prostate cancer patients, positive lymph node metastasis, Gleason score G8-10 and radiotherapy alone. Drug castration combined with radical radiotherapy is also associated with OS in patients. Conclusions Drug emasculation combined with radical radiotherapy is beneficial to the survival of prostate cancer in elderly patients.