MRCP2-3400
A 25-year-old woman presents to the Neurology Clinic with a 6-month history of diffuse headaches. Initially, the pain occurred only at certain times during the week, but it has now become continuous. She reports that the pain is worse in the morning and she has experienced mild nausea. Her medical history includes depression and acne vulgaris, and she is currently taking fluoxetine, the oral contraceptive pill, and tetracycline.
During the examination, Frisen stage 1 papilloedema affecting both eyes is observed, along with an enlargement of the blind spot and some diplopia on the left lateral gaze. Her body mass index is 32 kg/m2, and there are no other neurological signs.
A magnetic resonance brain scan is performed, which shows no space-occupying lesion. Cerebrospinal fluid (CSF) analysis demonstrates an opening pressure of 33 cmH2O.
What is the next best step in management, given the likely diagnosis?