FIELD: medicine, pharmaceutics.
SUBSTANCE: as a first active agent a pharmaceutical composition contains drospirenone in the amount equal to a daily dose when administering the composition and making 2 to 4 mg, and as a second active agent - ethinylestradiol in the amount equal to a daily dose and making 0.01 mg to 0.05 mg, together with one or more pharmaceutically acceptable carriers or additives. Drospirenone as a part of the pharmaceutical composition has a particle surface area more than 10000 cm2/g. Preferentially, drospirenone is fine-grained or sprayed from a drospirenone solution by inert carrier particles. The preparation contains a number of separately packed and individually taken daily dosage units in a single package used for oral administration for at least 21 days running with said daily dosage units containing a combination of drospirenone and ethinylestradiol. The preparation may additionally contain 7 and less daily dosage units containing no active agent, or containing ethinylestradiol only.
EFFECT: combination of drospirenone and ethinylestradiol provides reliable contraceptive activity ensured by the use of a maximum dose of drospirenone which causes no side effects, particularly, excess diuresis.
29 cl, 5 dwg
