Hi I have a question that I hope someone would no the answer to. I have been on methadone for about 9 years now I'm down to 70 I was on 200 mg. before I really regret getting on it because it feels like its been way harder for me to get off of than heroin was because I've kicked heroin many of time but did relapse a few times but I have a had quite a few years of sobriety. The times that I have used the methadone did give me that blockade affect but I would still feel it somewhat if I did enough. Well recently I have tried to see if by maybe using for a week or two would make me kick my methadone habit and try to deal with the heroin w/d. Well let me get to my question by the end of week one when I used by maybe my 6th bag which I would do maybe a half every so often out the day when I started to feel sick towards the end of the day I think when I got to probably the sixth one my heart would start to pound really fast and I would get like a huge flash of heat and my body would get extremely hot it would only last for like 5 min. or so but it really scared the crap out me because I've always been scared of the stories I hear about how people overdose from taking large amounts of heroin because they think they're not high but the meth' is just giving them that blockade effect. Has this ever happened to anyone or does anyone have a theory on what the hell could have been ? I would really appreciate if anyone can get back to me.