Not able to attain orgasm. Are good.

Hello, I'm 25 years old and I'm finding it difficult to get an erection while I'm with my partner. Also it's kind of difficult for me to maintain an erection when I masturbate. This problem has been there for close to two years now.For the first time I visited a doctor. And he prescribed me medications.It's been just three days since I've started taking the medicines and I'm getting an erection very easily but I'm not able to attain an orgasm because my male part feels very numb. This is very new. Usually when I get an erection I get an orgasm easily. But after taking these tablets I'm not able to but I'm getting an erection. Along with this I'm also having a mild headache with a nausea feeling. When asked my doctor he asked me to continue the medicines. But I don't want to. Below are the details. Reload gold - 2 tablets |night Vinsure 20 - 1 tablet | night Trazaril 50 - 1 tablet | night Hot shot oil. I don't have any other medical conditions.pls tell me if these tablets are good.