I went c/t off of 25 mgs.It took me 6 weeks to start to feel normal again.
Methadone has a long half life, which means it stays in your system longer. Because of this, it takes a lot longer to feel more normal. I would reccomend reading the Health Pages here near the top right of page. Look for the amino acid protocols.
Exercise and lots of vitamins, supplements and aminos can speed up your recovery.