I am currently 41 years old, 5 10 , 220 lbs. and have suffered from Tourette s syndrome since my youth. I m currently on prescription Clonazepam (4 mg per day) and while it helps the TS symptoms, I ve also noticed some sexual performance problems (failure to achieve an erection even when aroused, inability to maintain it for long, etc.) I ve been with my wife for 10 years and this has occurred with a high frequency, both before and after beginning the drug treatment two years ago. Is it possible that the TS or the Clonazepam treatment might cause sexual dysfunction, or would it be more likely other physical or pyschological factors? I do take Lisinopril for hypertension and Simvastatin for cholesterol, but both these figure are normal with medication. I am not diabetic or a smoker.