If you´re prone to hair loss these dosages will be enough to make your hair fall out. If you´re not, you´ll be fine. Finasterid (use Proscar, it´s much cheaper than propecia) will prevent most of the conversion to DHT and stop most of the hairloss, since none of the drugs you use is a DHT derivative.
You might consider to use zinc at 100mg/day. It´s proven that zinc in high dosages inhibits 5-alpha reductase AND aromatase activity to a great degree. It works for me and for hundreds of german bodybuilders. I recommend Tri Zinc formula 50 by KAL, USA.