a Mechanism of action of androgen deprivation therapy (ADT) and approved systemic therapies. The testes produce 90–95% of the total circulating testosterone, while the adrenal glands produce the remainder of the circulating androgens. Androgens, usually dihydrotestosterone (DHT), bind to the androgen receptor (AR), dissociating chaperone proteins. Ligand-bound AR molecules dimerise and translocate to the nucleus where they bind to androgen response elements and act as transcription factors to signal downstream targets. Apart from acting as AR antagonists, second-generation antiandrogens, such as enzalutamide, apalutamide and darolutamide, also prevent the translocation of AR to the nucleus. Abiraterone acetate, as a cytochrome P450 17A1 (CYP17) and α-hydroxylase inhibitor, largely prevents androgen biosynthesis. The detailed sites of action of abiraterone are not depicted in this diagram. GnRH Gonadotropin-releasing hormone, ACTH adrenocorticotrophic hormone, LH luteinising hormone. b Conventional treatment pathway of prostate cancer. mHSPC Metastatic hormone-sensitive prostate cancer, nmCRPC non-metastatic castration-resistant prostate cancer, mCRPC metastatic castration-resistant prostate cancer. *Cabazitaxel can be given in first-line treatment of mCRPC if docetaxel is given in the hormone-sensitive setting. Dates in parenthesis indicate month of US Food and Drug Administration approval; only drugs approved since 2018 have date of approval indicatedUnfortunately, mHSPC treated with ADT often transitions into a metastatic castrate-resistant state (mCRPC), defined by disease progression despite ADT with castrate testosterone levels (Fig. b). This may present in a variety of ways, including a continuous rise in serum prostate specific antigen (PSA) levels, progression of pre-existing disease and/or appearance of new metastatic deposits []. mCRPC is associated with a median survival of approximately 3 years []. Over the years, efforts were made to prolong the hormone-sensitive phase of treatment. The addition of first-generation antiandrogens, such as bicalutamide, to ADT was a commonly employed strategy to prolong the hormone-sensitive phase; this combination is often referred to as maximal androgen blockade. However, the benefit of this approach results in a low improvement rate of only 2–3% in 5-year survival alongside increased side effects []., The treatment landscape of metastatic hormone-sensitive prostate cancer (mHSPC) has changed radically in recent years. Androgen deprivation therapy (ADT) alone was for decades the standard of care for treating mHSPC. This changed when studies showed , Metastatic prostate cancer diagnosis often involves blood tests and imaging tests. A metastatic prostate cancer is an advanced cancer that has spread to other parts of the body..