A rapidly-dissolving oral dosage pharmaceutical composition for inhibitingovulation in a mammal, said composition comprising drospirenone or apharmaceutically acceptable salt or ester thereof, optionally ethinylestradiol or a pharmaceutically acceptable salt, ester or ether thereof, asurfactant and at least one pharmaceutically acceptable excipient, wherein thedrospirenone has a surface area of less than 10,000 cm2/g.