Since going on and off of methadone (very recently I am getting off hydrocodone for the first time in almost 8 years straight, 11.5 years total), I seem to get sudden sweats quite often. I keep a fan on me during the night, which makes my wife cold (now using an electric blanket). One minute I am hot & sweaty, the next, I am cold from the sweat and fan. I have to keep a fan at work and dread wearing a suit coat because of the two layers.