https://wikimd.org/index.php?action=history&feed=atom&title=Antiprogestogen 2026-04-26T11:43:54Z Revision history for this page on the wiki MediaWiki 1.44.2 https://wikimd.org/index.php?title=Antiprogestogen&diff=6295222&oldid=prev 2025-02-15T11:17:16Z

<p>CSV import</p> <p><b>New page</b></p><div>{{DISPLAYTITLE:Antiprogestogen}}<br /> <br /> == Antiprogestogen ==<br /> [[File:Mifepristone_structure.svg|thumb|right|Chemical structure of Mifepristone]]<br /> <br /> Antiprogestogens are a class of drugs that act by inhibiting the effects of [[progesterone]], a hormone crucial for the maintenance of [[pregnancy]] and the regulation of the [[menstrual cycle]]. These compounds are primarily used in [[medical abortion]], [[emergency contraception]], and the treatment of certain [[hormone-dependent conditions]].<br /> <br /> == Mechanism of Action ==<br /> Antiprogestogens work by binding to [[progesterone receptors]] in the body, thereby blocking the action of progesterone. This inhibition can lead to the breakdown of the [[endometrium]], the inner lining of the [[uterus]], and the detachment of the [[embryo]] in early pregnancy. In the context of the menstrual cycle, antiprogestogens can prevent the normal preparation of the endometrium for [[implantation]].<br /> <br /> == Uses ==<br /> <br /> === Medical Abortion ===<br /> Antiprogestogens, such as [[mifepristone]], are commonly used in combination with [[misoprostol]] to induce medical abortion. Mifepristone is administered first to block progesterone, followed by misoprostol to induce uterine contractions and expel the pregnancy.<br /> <br /> === Emergency Contraception ===<br /> In emergency contraception, antiprogestogens can be used to prevent pregnancy after unprotected intercourse. They work by delaying or inhibiting [[ovulation]] and altering the endometrial lining to prevent implantation.<br /> <br /> === Treatment of Hormone-Dependent Conditions ===<br /> Antiprogestogens are also used in the treatment of conditions such as [[endometriosis]], [[uterine fibroids]], and certain types of [[breast cancer]]. By blocking progesterone, these drugs can reduce the growth of hormone-dependent tissues.<br /> <br /> == Side Effects ==<br /> Common side effects of antiprogestogens include [[nausea]], [[vomiting]], [[abdominal pain]], and [[fatigue]]. In some cases, they may cause [[heavy bleeding]] or [[infection]] following medical abortion. Long-term use can lead to [[bone density]] loss due to decreased [[estrogen]] levels.<br /> <br /> == Related Pages ==<br /> * [[Progesterone]]<br /> * [[Mifepristone]]<br /> * [[Misoprostol]]<br /> * [[Medical abortion]]<br /> * [[Emergency contraception]]<br /> <br /> [[Category:Pharmacology]]<br /> [[Category:Reproductive health]]</div>

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