Hello, Loss sex drive can be either due to psychological reasons or some underlying cause.I guess a doctors counseling is suggested in most case to find likely cause of it. Mean while drugs such as vardenafil (Levitra) or tadalafil (Cialis) can be helpful for getting and maintain erection.Making life style improvements (for example; quitting smoking, and exercising more) can be helpful. If you are on some medications then work with doctors to select medications that do not impair erectile function. Psychotherapy can also prove rewarding. Regards