Can you take methodone after the expiration date?

I have been taking methadone for 2 months, and it takes about 36-72 to leave my system. I once tried taking suboxone 12 hours after taking 60mg methadone and it sent me into "precipitated withdrawal." It was honestly the worst hell I've ever been through in my life. I wish I would have had a gun; I would have killed myself. The withdrawal was insane and the worst of my life. I would say quitting methadone is 10x harder than quitting oxycontin. The withdrawal is unreal. Talk to a doctor before stopping your methadone use or else you're in for the bad, bad pain.