Titan25 the best way to take clen is to work up to a dose you can tolerate and then do one of 2 methods.One is to do 1 week on and 1 week off,this will give your receptors time to "clean out"the half life of clenbuterol is way too long for that 2 day on 2 day off crap,that is wrong. The 2nd option is to do a whole 2 weeks on but beware of the "crash"after you stop.-You won't feel very motivated.Your best bet is the 1 week on and 1 week off and on the in between weeks take something like phen-free,hydroxycut,caffine,aspirin,ephedrine stack.