This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Osteoporosis, Sex Hormones and OCPs, Subject name: Pharmacology
[{'content': 'Bremelanotide is a drug approved for treatment of \nSelect and explain. \nA. Erectile dysfunction, B. Lower urinary tract symptoms, C. Prostate Cancer, D. Metastatic renal cancer', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bremelanotide functions by activating the melanocoin receptors. It was shown to be effective in treating sexual dysfunction in both men (erectile dysfunction or impotence) and women (sexual arousal disorder). Unlike phosphodiesterase inhibitors like sildenafil, it does not act upon the vascular system, but directly increases sexual desire the nervous system. The primary target for ED will be patients non-responsive to PDE-5 inhibitors, with patients receiving bremelanotide either as a monotherapy or in combination with a PDE-5 inhibitor.', 'role': 'assistant'}]