Norethisterone combined pill

The progestagens in combined pills include des-ogestrel, gestodene, norgestimate, ethynodiol, lev-onorgestrel and norethisterone. The first two agents have more favorable effects on plasma lipids and cardiovascular risk but are associated with higher risks of venous thromboembolism (see below). 

Menstruation can be postponed by giving oral norethisterone 5 mg t.d.s., starting 3 days before the expected onset bleeding occurs 2-3 days after withdrawal. Users of the combined oral contraceptive pill (having a 7-day break) can simply continue with active pills where they would normally stop for 7 days. 

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