Bridging gap in treatment of polycystic ovarian syndrome through drug repurposing: what we achieved and where we are?

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Polycystic ovarian syndrome (PCOS) is one of the chief causes of infertility in women of reproductive age. Several drugs belonging to the oral contraceptive class have been approved for the treatment of PCOS. Nonetheless, the capability to target only a few symptoms of PCOS and fatal side effects are key hurdles to their use. Therefore, repurposing existing drugs can be promising in managing PCOS efficiently. Drugs from different pharmacological classes like antidiabetics (metformin, rosiglitazone, pioglitazone, and semaglutide), statins (simvastatin and atorvastatin), antiandrogen drugs (finasteride and flutamide), etc. demonstrated significant potential in managing PCOS. The present review offers a comprehensive overview of all the medications examined as potential repurposed options for the efficient treatment of PCOS. The pathogenesis of PCOS, existing therapies for PCOS and their challenges, drug repurposing and its significance is also explained. The small-molecular drugs from various pharmacological classes and different phytoceuticals repurposed against PCOS are discussed along with their anti-PCOS activity mechanisms. Moreover, novel drug targets responsible for PCOS and opportunities for drug repurposing are briefed. The repurposed drugs in clinical trials for PCOS and drug repurposing challenges are discussed. Thus, drug repurposing can serve as a potential way to effectively treat PCOS, reducing the extent of infertility and improving the quality of life of women.