The results showed partial degeneration of spermatogenic cells with suppression of their spermatogenesis activity after drug administration, also there was increase in the thickness of the basement membrane of the seminiferous tubules in addition to decrease of RNA and DNA content. There was a reciprocal relationship between the reactions of alkaline and acid phosphatases, while the first appeared weak after treatment, the second gave opposite results. One month after drug withdrawal the majority of the seminiferous tubules appeared nearly normal.