I've personally used Clen with and without Ketotifen, but when i've used these two drugs in combination the sides of clen were completely eliminated, but my gains were completely eliminated too... I was using clen for 3 weeks 1 week off at the time, thinking that with constant intake of ketotifen at 4 mg/day the receptors would be upregulated pretty easily.

I know that in theory ketotifen is supposed to increase the effectiveness in clen, but in practice it seems to have neutralized it... Now i'm debating whether to do a normal 2 week off 2 week on cycle, with ketotifen only in the off weeks.

Does anyone have the same experience? Maybe i think that clen isn't working because i'm not experiencing any sides while on ketotif?