Oxygen Cluster headaches. May also be used for single severe episodes. Agent of choice. Effective for single episodes and cluster headaches. Effective at any time during attack.
Symptoms associated with headache, e.g., nausea, vomiting, photophobia, phonophobia, also respond.
Maximum response in 2 hrs after injection and 4 hrs after oral administration. Should not be used at any time in patients with a more serious neurological deficit presumed to represent vasospasm with ischemia, whether cleared or persisting, e.g., homonymous hemianopsia, hemiplegia. Should not be used if an ergot preparation has been taken within 24 hrs.