I've been taking propecia for 15 months. During the first 13 months, I had unbelievable results. My hair got thicker and fuller, filling in towards the temples and along the hairline. I could not believe how terrific it worked. In the past two months, my hair has done a complete 180. I feel as though the propecia has totally stopped working, and all of the built up DHT has rushed back in mass quantities. My hair feels coarse and thin again, falling out in the shower, when I run my hand through it, and on the pillow. I am completely depressed and cannot understand why a product that had such tremedous results could suddenly stop working with such extreme results. Has anyone else gone through this? Will the healthy hair return? I know this is more than a shed, because the quality of hair throughout my head has changed. I'd like to hear from someone else who has experienced this.