Triptans for acute cluster headache.

Cluster headache is an uncommon, but severely painful and disabling condition, with rapid onset. Validated treatment options are limited, and first-line therapy includes inhaled oxygen. Alternative therapies such as intranasal lignocaine and ergotamine are not as commonly used and are less well studied. Triptans are successfully used to treat migraine attacks and, because of this, they may also be useful for cluster headache.