When can hormonal contraception be initiated after using ulipristal acetate emergency contraception?
• Ongoing hormonal contraception may be started at the same time as giving oral emergency contraception (unlicensed) but with advice to use additional contraception (such as condoms) at least until the next period. • Ulipristal acetate binds with high-affinity to the progesterone receptor, so may reduce the effectiveness of regular hormonal contraception. [ABPI Medicines Compendium, 2009].