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We present the case of a patient who developed left lower extremity monoplegia following intra-arterial infusion of verapamil for treatment of diffuse cerebral vasospasm, 6 days after initially undergoing treatment of a ruptured right A1-2 junction aneurysm. A repeat angiogram following this intra-arterial vasodilator treatment demonstrated a coil loop which had herniated into the right A2 artery. Herein, we describe a previously unreported complication which occurred following intra-arterial pharmacologic vasospasm treatment, review the existing literature, and suggest potential causes and treatment options.<\/jats:p>","DOI":"10.1177\/1591019915581990","type":"journal-article","created":{"date-parts":[[2015,5,1]],"date-time":"2015-05-01T20:41:05Z","timestamp":1430512865000},"page":"184-187","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":4,"title":["Coil herniation following intra-arterial verapamil infusion for the treatment of cerebral vasospasm: Case report and literature review"],"prefix":"10.1177","volume":"21","author":[{"given":"Stephanie H","family":"Chen","sequence":"first","affiliation":[{"name":"University of Pittsburgh School of Medicine, Pittsburgh, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ramesh","family":"Grandhi","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christopher P","family":"Deibert","sequence":"additional","affiliation":[{"name":"Department of Neurological Surgery, University of Pittsburgh Medical Center, Pittsburgh, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tudor G","family":"Jovin","sequence":"additional","affiliation":[{"name":"Department of Neurology, University of Pittsburgh Medical Center; 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