ive only done it a handful of times. maybe every other friday. I typically do .5 to a full gram over the course of 3 - 4 hours. I do it all up one side cuz the other side is usually hindered by allergies and what not. after maybe 3 or so good lines im feelin good but then my ear would hurt... my buddy claimed it was just the pressure. then my eye. and then the area above and below. i dont get migraines or anything. but this shit hurts. If this is what its like i dont see the appeal. lol. anyone else have this problem? this is some fire too. im not new to stims either. Any ideas? thanks!