Therapeutic compositions are proposed for treating and preventing benign prostatic hyperplasia, prostatitis, impotency, infertility and prostate cancer and to a method for the use thereof. They are based on dextrorotary or levogeratory or racemic camphor in the form of a fatty-oil-dimexide emulsion, an oil-aqueous emulsion, or suppositories, the camphor quantity being of 0.1-15.0% by volume. The compositions are rectally administrable once a day by course of therapy up to 20 days every year. They increase the resistance of tissue colloids, activate the erection center of the parasympathetic nervous system, exhibit M- and H-cholinolytic action, produce tonic action on the ejaculation center, normalize the capillary and venule tonus, stimulate vasomotor centers of the spinal chord, enhance the synthesis of macroergic phosphates, inhibit ATP-acid splitting in the hypoxia conditions and exhibit analgesic, bactericidal and fibrinolytic effect, etc. The compositions and method enable carrying out the preventive treatment of the above-listed disease.