My mom use to take meltolan 15mg (drug olanzapine) from last 5 years, given now that medicine is no longer being manufactured , doctor has prescribed Oleanz 15, however Oleanz is not available in 15mg , instead it s Oleanz RT 15 ( Olean Rapitab) is available. My question is , whether there is any difference between Oleanz and Oleanz RT , if yes, whether the differences can affect adversely?