Gestrinone |
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| Aventis Brand of Gestrinone; Dimetriose; Florizel Brand of Gestrinone; Hoechst Brand of Gestrinone; Nemestran; R-2323; R2323; R 2323 | |
| A non-estrogenic contraceptive which is a weak progestin with strong anti-progesterone properties. It is effective if used once a week orally or can also be used in intravaginal devices. | |