This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': 'Impoant difference between leuprolide and ganirelix is that ganirelix: \nSelect and explain. \nA. Can be given orally, B. Immediately reduces gonadotropin secretion, C. Must be given in a pulsatile fashion, D. Initially stimulates release of LH and FSH', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Ref: KDT 6/e p236) GnRH agonists like leuprolide, goserelin and nafarelin etc. are used by parenteral route. Continuous administration of these agents decreases gonadotropin secretion whereas pulsatile administration increses the secretion. When used continuously even then first few doses cause increased secretion of gonadotropins (LH and FSH) leading to flare up reaction in prostatic carcinoma. GnRH antagonists like cetrorelix and ganirelix are also used by parenteral route but these drugs immediately reduce gonadotropin secretion.', 'role': 'assistant'}]