This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Pharmacology
[{'content': 'Which of the following antihypeensive is used in premenopausal syndrome \nSelect and explain. \nA. Clonidine, B. Hydralazine, C. Losaan, D. Amlodipine', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Clonidine is a centrally acting antihypeensive drug Other uses: Treating cancer(severe) pain, menopausal syndrome, migraine, alcohol, opioid de-addiction REF.Essentials of Medical Pharmacology KD Tripathi 8th ed.', 'role': 'assistant'}]