I have been using trimix with what was a way to strong of a dose. My first was well over 4 hours. I got Dr to prescribe a lower dose and even it was too strong so i dialed it back to 1/4. It produced a satisfory erection, but I have been unable to climax, My dorctor says it has to be stimulation, but I am not believing that. It seems like the sensation/ feeling is reduced. Any one else had this problem?