Special Considerations in the Treatment of Idiopathic Intracranial Hypertension.

Purpose of review: To review the management of Idiopathic Intracranial Hypertension (IIH) with co-existing conditions affecting therapy: obesity, sulfa allergy, nephrolithiasis, and pregnancy.

Recent findings: The IIH-WT trial showed that bariatric surgery is currently the most effective method for obese patients with IIH to lose weight, leading to normalization of CSF pressure in many cases. Allergy to sulfonamide antibiotics does not preclude the use of acetazolamide; rather, penicillin allergy or multiple drug allergies are the strongest predictor of a hypersensitivity reaction. Carbonic anhydrase inhibitors should be avoided in individuals with a personal history of nephrolithiasis; the risk of renal stones increases with concomitant use of other medications with the potential for nephrolithiasis. Glucagon-like peptide-1 receptor antagonists (GLP-1RA) are promising non-surgical weight loss options although preliminary studies have not demonstrated considerable impact on papilledema, headache or vision. Women with IIH have high rates of pregnancy complications partly related to obesity. Recommendations for weight gain or loss during gestation are controversial. Recent studies show better outcomes in obese women who maintain or lose weight while pregnant including gestational diabetes, pre-eclampsia and emergency caesarian section. Progress continues in the search for the cause and best treatments for IIH. Larger multicenter trials of GLP-1RA are needed to determine their efficacy.