This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Headache And Migraine, Subject name: Medicine
What is the drug of choice for idiopathic intracranial hypeension (I.I.H)? 
Select and explain. 
A. Acetazolamide, B. Glycerol, C. Mannitol, D. Dexamethasone
A: Acetazolamide
Answer: A: Acetazolamide 
Explanation: Acetazolamide -Most effective agent for lowering ICP in idiopathic intracranial hypeension. In Acetazolamide intolerance, furosemide may be used For headaches-Amitriptyline, propranolol. For progressive loss of visual field -High dose oral prednisone. -Some patients experience deterioration of their visual function, surgical intervention may be considered. 1. Optic nerve sheath fenestration (decompression) 2. Cerebrospinal fluid (CSF) diversion ( lumbo-peritoneal or ventriculo-peritoneal shunt)