I have been taking finasteride and spiro together since I started hrt almost a year ago. That combo has worked for me. I use to have really thick, dark, and long back and chest hair, but has been drastically reduced. The difference is like night and day. My back has only a few small blonde hairs now, and my chest only has about half the hair it use to have although the hair that remains is much thinner and softer. It doesn't grow as fast either. I also had a small bald spot on the back of my head which has hair now, but I also used minoxidil 5% and took silica, biotin, and alfalfa to help with that. I'm not sure if the finasteride is doing all this itself since I've been on it the whole time, but this has been my experience with it.