Finasteride blocks about 60% of circulating DHT by blocking 1 of the 3 DHT receptors. Most people taking finasteride do see some results and about 10% of those taking it experience side effects. If you are interested in seeing better results with lower incidence of side effects I...
Yes, you need a doctor's prescription for Propecia. In regards to your hair loss and thinning, you should be evaluated by a trained physician to make sure you are a candidate for hair transplant surgery.
It's difficult to tell from just the two photos. Try taking some additional photos. A great first step would be an online consultation. Often you can submit photos to top hair restoration surgeons for a complimentary evaluation. This should help lead you in the right direction. Having multiple...