That depends man. If you haven't done it in more than six weeks but you used to do it a lot then no. But you should use less than you used to. Either way your tolerance will have decreased so you should use less than the last time you did it if you don't want to get sick. But if you haven't used dope in more than six weeks you might want to just not use it. I'd kill to be able to be opiate free for six weeks. Haven't been able to do that for two years now. Be Safe, Get High, -V
i dunno, i have a friend who was addicted to it for a couple of months who said that he was clean for like a month, did it once, again, and withdrew. if thats the sickness you mean, but it depends i guess, varies with everyone.