hey dude , i know EXACTLY WHAT YOU MEAN , i am the same way but not with valiums , valiums kick my ass , but ZANEX (xnanex) i am totally immune too , have been ever since i tried one , why i dont know i have even taken 10 before and they had no effect on me what so ever. so i assume diffrent ppl with diffrent body chemestries are immune to certain drugs. you are immune to valiums , i am immune zanex , it fuckin sucks dont it ? hope i helped