I don't understand what's going on with me. I've been on methadone treatment for 2 months, I went up to 80mg and I'm now in the tapering off part of my treatment. Im now at 55mg and I'm experiencing some of the same side effects as I did when I was going up to and was at 80mg. I'm not so much sleepy but if I sit down and get comfortable, I pass smooth out. I'm wanting to go to bed earlier and even worse just today I drove to the store 1/4 mile from the house and when I got back I parked the car. The next thing I know is I'm being woke up in the car while it's still running and an hour had gone by since I got home. I had completely passed out in the car in a matter of seconds. That's very dangerous. The effects I'm having are similar to if I had been taking drugs while on methadone, but I have not taken anything. Why is this happening to me and is it common? Has anyone else experienced Anything like this?