I couldn't remember all the names but just looked them up. The most common treatment when on is Proscar (Propecia) to help with hairloss. But I believe Dutasteride (similiar to propecia but stronger) is better but both can carry many sides. These include loss of libido so that shouldn't be much of a problem if your on a test cycle but not when off cycle. Other possible sides include sleeping problems and even mood swings. I would research them all and decide for yourself.
Other products to research that have good reps are Rogaine and Provillus. I don't really know anythign about them but hear they are good.
I also believe a shampoo called Nizoral is suppose to be great. Get the 2% version. That isn't even advertised as a hair loss treatment but a dandruff shampoo. It's suppose to really thicken your hair and really does work. You should use that every few days and leave it on about 3-5mins before rinsing.
By the way I have never tried any of those products but know people who have tried the propecia, rogaine and nizoral and speak highly of them. Liek I said I was happy for it to disappear. Saying that I was abut pissed when the sides starting going. Now because of that I have to shave it every week (or even less) so I don't have a big hairline going all around my head. I put that down to my tren and adrol. When using them I saw a big difference in a matter of weeks. Hope it helps.