“…64 In a retrospective series of 10 patients with untreated and 10 with coiled aneurysms who were using triptans, no complications occurred. 63 A study of 12,339 migraineurs using injectable sumatriptan reported no intracranial hemorrhages over a 1-year period,as about 5% of the general population has an asymptomatic aneurysm, this can be interpreted as at least somewhat reassuring, 65,66 In regard to AVMs, evidence is scarce. Henkes et al administered subcutaneous or intra-arterial sumatriptan to 3 patients without AVMS, 2 patients with an arteriovenous fistula and 3 patients with an AVM.…”