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CONTRACEPTIVE PREPARATIONS AND LOW DOSAGE REGIMEN INVOLVING THREE PHASES, EACH CONTAINING PROGESTOGEN AND ESTROGEN, THE AMOUNT OF PROGESTOGEN DECREASING FROM PHASE ONE TO PHASE THREE; PREPARATORY PROCESS
CONTRACEPTIVE PREPARATIONS AND LOW DOSAGE REGIMEN INVOLVING THREE PHASES, EACH CONTAINING PROGESTOGEN AND ESTROGEN, THE AMOUNT OF PROGESTOGEN DECREASING FROM PHASE ONE TO PHASE THREE; PREPARATORY PROCESS
A contraceptive method and regimen utilizing an initially greater amount of progestogen, which gradually tapers over the period in which the contraceptive is administered. The regimen includes a multiphasic combination and contraceptive kit containing at least 21 daily sequential dosage units divided into 3 phases. The first phase contains 6-8 dosage units, each containing a progestogen at a dosage equivalent in progestogenic activity to 75-150 mu g desogestrel and an estrogen at a dosage equivalent in estrogenic activity to 20-25 mu g ethinyl estradiol. The second phase contains 6-8 dosage units, each containing less progestogen than in the previous dosage units, but still having progestogen equivalent to 75-125 mu g desogestrel and an estrogen equivalent to 20 mu g ethinyl estradiol. The third phase contains 6-8 dosage units, each containing less progestogen than in the previous dosage units, but still containing a progestogen equivalent to 75-100 mu g desogestrel and an estrogen equivalent to 20 mu g ethinyl estradiol. The kit may also include another phase of 4 to 7 dosage units having no contraceptive steroid.
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