Please Select Acyclovir Adipex Aldara Allegra Alesse Ambien Bontril Celebrex Cialis Cipro Clarinex Clarityn Cyclobenzaprine Denavir Didrex Fioricet Flexeril Flonase Generic Prozac Ionamin Levitra Meridia Nasonex Nexium Ortho Tri-Cyclen Paxil Phentermine Prevacid Prilosec Propecia Reductil Renova Retin-A Skelaxin Soma Sonata Tenuate Tramadol Ultram Uprima Valtrex Vaniqa Viagra Vioxx Xenical Zanaflex Zyban Zyrtec Propecia Propecia. Propecia stops male pattern baldness by blocking increased levels of DHT. DHT is one of the hormones that is responsible for male development in the early stages, and is a major contributor in hair loss, as men get older. DHT shrinks the hair follicle until it no longer produces visible hair. By blocking DHT hair loss is stopped and the hair growth process is restored again.