<INS-S DATE="20020226" ID="INS-S-00014"/>13. A combination product for oral contraception, comprising</claim-text> (<i>a</i>) <i><HIL><BOLD>23</BOLD></HIL> or <HIL><BOLD>24</BOLD></HIL> daily dosage units, each containing </i> >2.5 to 3.0 mg of drospirenone, and (b) 5 or 4, respectively, active ingredient-free placebo pills or other indications to show that the daily administration of the 23 or 24 dosage units, respectively, is to be followed by 5 or 4, respectively, pill-free or placebo pill days, wherein each of the dosage units containing drospirenone contains the same amount of drospirenone. view more

<INS-S DATE="20020226" ID="INS-S-00016"/>15. A combination preparation of claim 13, which comprises <HIL><BOLD>24</BOLD></HIL> dosage units and <HIL><BOLD>4</BOLD></HIL> placebo pills or other indications to show that no dosage unit or placebo pill strual cycle. view more