Hi I am a 49 yr old male,ive been very fit all my life,been on methadone for nearly 18 yrs constantly now,over the last 7-8 yrs I noticed I had no lobido,on studying on how to increase your testosterone levels avidly,i don't take any meds to help boost my testosterone levels,i tapered down to 20mg a day but started using again mainly down to my lack of lobido ,so im back up to 70mg daily,but I hope I have found the culprit for my very low lobido,its virtually non existent & it broke up my 5yr relationship with my ex girlfriend,im not on any other medication,i had my testosterone levels checked & they are good for a 49yr old male,so I hope if I have the strength to taper down to zero methadone properly,which will take me atleast a year my lobido will come back eventually or have I done to much damage to my endrocine system with opiate abuse for it not to return permanently,could anyone give me factual information on long term methadone addiction & the time scales when totally abstinent of all drugs ,if it will ever return,i am praying I can get it back as this will give me the drive to come of my addiction completely? MANY THANX FOR THIS SERVICE JOHN