Is anyone else on methadone? How Long have you been on it? and what are the long term side effects?

I have been on 130 mgs of methadone for ten months now. I am constantly constipated and fall asleep easily. But when I don't take it I feel very depressed.

: http://alcoholdrugstreatment.info/is-anyone-else-on-methadone-how-long-have-you-been-on-it-and-what-are-the-long-term-side-effects