Article Document Academic Article Information Content Entity Continuant Continuant Journal Article Entity Entity Generically Dependent Continuant 2025-05-06T22:01:06 RDF description of A case report of opisthotonos associated with administration of intramuscular ketamine - http://repository.healthpartners.com/individual/document-rn27353 Adverse Effects 33138 document-rn27353 10.5811/cpcem.2021.6.53069 public 19439 A case report of opisthotonos associated with administration of intramuscular ketamine Clinical practice and cases in emergency medicine Drugs and Drug Therapy Emergency Medicine 2022-02-21T22:48:57.408-06:00 4 5 <p>INTRODUCTION: Ketamine, a commonly used medication to treat agitation, has known adverse effects such as emergence reactions, vomiting, and laryngospasm. Opisthotonos has not been a commonly reported adverse reaction. CASE REPORT: We report a case of opisthotonos brought on by administration of ketamine. A 24-year-old male with a history of schizophrenia was brought in by emergency medical services with opisthotonos shortly after treatment with 250 milligrams intramuscular ketamine by paramedics. He had become increasingly paranoid after being off his aripiprazole for a few weeks, and his family had become afraid for his and their safety. Paramedics administered ketamine to control his combative agitation, per protocol. The patient's extreme neck and back extension rapidly resolved with the administration of midazolam. Further history and workup did not reveal another cause for opisthotonos. CONCLUSION: This is the first reported case to our knowledge of ketamine-associated opisthotonos in the emergency setting. Emergency care providers should be aware of this potential side effect.<p>