I kliniske undersøgelser er rosiglitazons glucosesænkende effekt indtrådt langsomt med påviselig maksimal reduktion i fastende plasmaglucose (FPG) efter cirka 8 ugers behandling.
In clinical trials, the glucose lowering effects observed with rosiglitazone are gradual in onset with near maximal reductions in fasting plasma glucose (FPG) evident following approximately 8 weeks of therapy.