Selective progesterone receptor modulators for the treatment of dysmenorrhea: an update
Anna Rosa Speciale1, Kubra Ozpinar, Milo Giani1
1Department of Obstetrics and Gynecology, University of Florence, Careggi University Hospital, Florence, Italy.
Introduction:
Dysmenorrhea is a painful symptom associated with uterine contractions and menstrual bleeding and is treated by administering analgesic drugs. Since progesterone receptors (PRs) have a major role in regulating uterine tissues (myometrium and endometrium) physiology, oral contraceptives are used off-label for treating primary or secondary dysmenorrhea. The development of selective progesterone receptor modulators (SPRMs), a class of synthetic steroids with agonistic, antagonistic, or mixed effects in targeting PRs in different tissues, stimulated their possible clinical use for treating secondary dysmenorrhea related to uterine diseases (endometriosis, adenomyosis, uterine fibroids).
Areas Covered:
The present review examines the development of the clinical trials and observational studies done with the different SPRMs for the treatment of dysmenorrhea in patients with uterine diseases.
Expert Opinion:
Mifepristone, telapristone acetate and vilaprisan have antagonistic activity on PRs, whereas ulipristal acetate and asoprisnil have both potent antagonist and partial agonist effects.Since no studies have been done on primary dysmenorrhea, the different SPRMs have been evaluated in the treatment of endometriosis, adenomyosis and uterine fibroid-related dysmenorrhea.
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