Intranasal lidocaine for cluster headache.

Thirty male patients with cluster headache were given 4% lidocaine solution to use intranasally as an abortive therapy. Four sprays of lidocaine were used ipsilateral to the pain, and two more were used, if necessary. Twenty-seven percent of the men reported moderate relief, 27% obtained mild relief, and 46% stated that they had no relief from the lidocaine, Side effects were minimal. In this study, intranasal lidocaine was only a marginally helpful therapy for cluster headache. However, because of the ease of administration and lack of side effects, lidocaine may remain worthwhile as an adjunctive medication.