I Am Patient Of Epilepsy & Depression & Also Take

I am patient of epilepsy & depression & also take drug for it as my psychiatrist.(Topaz 100 mag 1 tab in morning & 1 tab in evening & nexito tab 20 mg & lematec 100 mg on tab for in moring & 1 tab for in evening. I am unmarried person but when I do masturbation my penis no erect means my sexual dysfunction he prescribe me Tentex fort tab take 2 Tentex forte tab last 3 days. But still not effect. So how much time take.