hi i am a 48 yo male i take blood pressure tablets i am 6ft tall and weigh 120 kg . i have been having trouble maintaining an erection and bit of over excitement when i do get and erection during intercourse as i worry if i do not get it over with i will go soft so to speak. i do have a little bit of stress in my life and bit of anxiety due to the worryt of this problem. my wife thinks i am playing up or lost interest in her. i have tried to tlak to my doccctor but when i did he just said that my blood tablet can cause lack of sex drive and erectial probles whic makes me want to stop taking them ...is this true and can i change them or any suggestions as i still want sex but avoid it now :(