finasteride and mis-information

My docotor who prescribed Finpecia (Finateride 1mg by Dr. Ready Pharmaceuticals) for 90 days. He indicated about men suffering from erectile dysfunction but only in 1 % case. But now after surfing the website https://buying-propecia.com/ including this finding, I understand that the risk rate is much beyond that. I understand you are a pharmacist and from your experience, would you recommend one using Finpecia ??

The risks for sexual side-effects from finasteride is between 2-4%.  Some people believe it is the drug dosage and they reduce the dosage even without known sexual side effects.  Unfortunately there is a lot of mis-information from doctors and the internet. I am a physician and hair transplant surgeon, not a pharmacist; however, I don’t think that concentration of the drug alone is an indicator of response to the drug. One might also want to consider receptor sensitivity and number of receptors and probably other parameters on the biochemical and cellular level.