ATC Group: G03XB Antiprogestogens

The World Health Organization's ATC classification organizes medical drugs based on therapeutic properties, chemical composition, and anatomy. It helps make essential medicines readily available globally and is widely used in the pharmaceutical industry.

Position of G03XB in the ATC hierarchy

Level Code Title
1 G Genito urinary system and sex hormones
2 G03 Sex hormones and modulators of the genital system
3 G03X Other sex hormones and modulators of the genital system
4 G03XB Antiprogestogens

Group G03XB contents

Code Title
G03XB01 Mifepristone
G03XB02
G03XB51

Active ingredients in G03XB

Active Ingredient Description
Mifepristone

Mifepristone is a synthetic steroid with an antiprogestational action as a result of competition with progesterone at the progesterone receptors.

Ulipristal

Ulipristal is an orally-active synthetic selective progesterone receptor modulator which acts via high-affinity binding to the human progesterone receptor. When used for emergency contraception the mechanism of action is inhibition or delay of ovulation via suppression of the luteinising hormone (LH) surge. Pharmacodynamic data show that even when taken immediately before ovulation is scheduled to occur (when LH has already started to rise), ulipristal acetate is able to postpone follicular rupture for at least 5 days.

Related product monographs

Title Information Source Document Type  
ESMYA Tablet Medicines & Healthcare Products Regulatory Agency (GB) MPI, EU: SmPC
MEDABON CO Tablet, Vaginal tablet Health Products Regulatory Authority (ZA) MPI, Generic
MIFEGYNE Tablet Medicines & Healthcare Products Regulatory Agency (GB) MPI, EU: SmPC