brompheniramine maleate, and homatropine methylbromide. The effects of ionicliquid concentrations, salt effect, cations, and anions of ionicliquids on enantioseparation were investigated and the results proved that there was a synergistic effect between hydroxypropyl‐β‐cyclodextrin and the ionicliquid, and the cationic part of the ionicliquid played an important role in the increased resolution. With the