(((WW))) DO NOT DO THIS BY YOURSELF! Please, call your doctor and tell him you want off the medication, and allow the MD to help wean you off. Self dosing methadone, rather than taking it on a regular basis is NOT the way to do good pain management, sorry.

The plasma elimination half-life of methadone is 8 to 59 hours. I suspect that you still need it for pain management, because it's working so well.

You may need an antiinflamatory and physical therapy when the sciatica acts up. That is nerve pain to the severest level, and pain meds often don't help it, just zone someone out.

I hope your birthday was a good one!