Provided is an incretin, or analogue thereof, an incretin receptor agonist, an incretin enhancer, or any combination thereof, for use in a method of reducing elevated intracranial pressure (ICP) in a subject. Methods of reducing elevated ICP in a subject may comprise administering an incretin, or analogue thereof, an incretin receptor agonist, an incretin enhancer, or any combination thereof to the subject. The elevated ICP may be associated with idiopathic intracranial hypertension (IIH), secondary pseudotumour cerebri, hydrocephalus, normal pressure hydrocephalus, raised intracranial pressure secondary to a brain tumour, meningitis, brain trauma, brain injury, and venous sinus thrombosis.
