Talk to Dermatologist on Erectile Dysfunction

I am married for 8 years with 3 children, everything is okay since that time but for hair loss issue I am using finesteride 1 mg for about 2-3 years, and with that (finesteride) I have severe erectile dysfunction for two months that is worse and worse for the time..... Plz suggest me what can I do for erectile dysfunction, what medicine I can use for that