Oseltamivir (Tamiflu)-induced Bilateral Ciliochoroidal ‎Effusion and Angle Closure Glaucoma: What Type of ‎Idiosyncratic Reaction?‎

To report a case of bilateral acute angle closure glaucoma after one dose of 75 mg oseltamivir.
Case Report: A 37-year-old man with a history of influenza developed high intraocular pressure and uniformly shallow anterior chamber in both eyes 5 hours after receiving the first dose of 75 mg oseltamivir. The condition was successfully managed with topical cycloplegic and systemic/topical antiglaucoma medications.
Since a presumed idiosyncratic reaction developed right after receiving the first dose of the medication, it challenges the common concept of adaptive immune system involvement in this type of reaction in medication-related ciliochoroidal effusion.