They have no with drawl symptoms when used in moderation. Even daily use is okay and it's my belief that anybody who says they experienced "withdrawal" symptoms it's not physical but rather mental "withdrawal". I know first hand as I'm a heavy high tolerance smoker and when I have no marijuana the first couple of days I'll want to smoke but don't and I find myself a bit irritable. After about 2-3 days I'm feeling happy and everything's great!