What happens when you smoke marijuana laced with methadone?

Nothing really. Actually it's pretty pointless. You couldn't lace enough marijuana with methadone to really feel the effects of methadone anyway. You may get a slight opiate buzz, but other than that, nothing much. I mean u would need about 20mg's of methadone to really feel anything and if you put 20mg's of methadone in a joint or blunt of marijuana, you would basically be smoking methadone laced with marijuana LOL, thats how much methadone there would be. (20 mg's of methadone is alot of powder) And if it is dipped in liquid methadone, than it would be the same thing, there just wouldn't be enough methadone absorption to make a significant difference.