This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
[{'content': 'Which of the following agent is not used for treatment of erectile dysfunction \nSelect and explain. \nA. Prostaglandin E2, B. Vardenafil, C. Phenylephrine, D. Alprostadil', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Phenylephrine is an alpha agonist and will cause vasoconstriction therefore not used in erectile dysfunction where vasodilation of penile vessels is required Other Drugs given in the option are used for this condition For fuher details see chapter 19 Refer kDT 6/e p295-296', 'role': 'assistant'}]