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
Which of the following antihypeensives does not alter serum glucose and lipid levels? 
Select and explain. 
A. Propanolol, B. Prazosin, C. Thiazide diuretics, D. Furosemide
B: Prazosin
Answer: B: Prazosin 
Explanation: Prazosin doesn't impair carbohydrate metabolism, suitable for diabetes mellitus, it has only a slight effect on lipid profile. Prazosin is a selective alpha 1 antagonist. Diuretics - cause hyperlipidemia and hyperglycemia Beta-blockers- by blocking beta 2 receptors on liver-could cause hyperglycemia to a slight extent and hyperlipidemia K.D. Tripathi : Essentials of medical pharmacology, seventh edition, page no 564