I've heard of this. The only explanation I can think of is a person tends to start sweating when drinking to help purge the alchohol, and this will cause your body to go into a "purge cycle" that could cut into your dose time.
Frankly, just about evrything you do cuts into a methadone dose. it's why the best thing you can do is minimize your input of any substances period, and try to stay on a regular sleep cycle.
I dont believe so. did not seem to do that when I took it. ofcourse if your hung over,you will be taking more..........
just curious what kind of methadone treatment are you on?