Has anyone else (besides my friend) had (dirty) pills that have messed up with the body temperature. I have had some recently that make him cold one minute and hot the next, which makes him feel really uncomfortable. It almost felt like the physical symptoms of a fever or the flu, but not as bad. This was accompanied by cold sweat and tense muscles. I doubt the chemical causing this was MDMA. Anyone have any ideas what it is, and how to reduce these side effects should I experience them again?