How effective is 20mcgEE/3mgDRSP as contraception? 20mcgEE/3mg DRSP is of comparable effectiveness to other combined oral contraceptives. [1,2,3] A large US observational study reports lower failure rates amongst users of a 24/4 EE/DRSP regimen than a 21/7 EE/DRSP regimen. The study also suggests greater contraceptive effectiveness of a 24/4 EE/DRSP regimen than with a 24/4 regimen containing EE in combination with norethisterone.
This document is up-to-date