有无能够够真正有效阻止前列腺继续增生的药物。

草药，西药均可。但是要有科学根据的，实践证明的。如果是激素类，对性功能有无影响？

Proscar, an inhibitor of DHT hydroxylase, can prevent the convertion of testosterone to DHT, therefore can cause atrophy of prostate gland and at least slow down the hypertrophic process.
http://www.merck.com/product/usa/pi_circulars/p/proscar/proscar_ppi.pdf

alpha inhibitor causes the relaxation of smooth muscles and improves urinary obstruction. It has no significant effect on prostate growth.

Some herbs contain phytoestrogen and has anti-androgen effect, therefore may inhibit the hypertrophic process.