A friend of mine is quite new to using (smoking mainly) meth, he uses it probably twice a month. And has only been doing so for around a year perhaps... Now every time he knows he's about to get on it he gets stomach cramping/ churning and pretty much needs to shit real bad. This happens to him every time now and he feels fine again once he smokes his gear. He's not worried, just curious if this is normal? If it happens to anyone else? Sorry if this is a worn out topic, new to the site and haven't really had the chance to look around yet 
