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Immunoglobulin E‐Mediated Hypersensitivity Reaction to Ketamine
Author(s) -
Ozcan John,
Nicholls Katherine,
Jones Karin
Publication year - 2016
Publication title -
pain practice
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.899
H-Index - 58
eISSN - 1533-2500
pISSN - 1530-7085
DOI - 10.1111/papr.12466
Subject(s) - medicine , ketamine , hypersensitivity reaction , tryptase , antihistamine , rash , drug allergy , anaphylaxis , anesthesia , allergy , edema , dermatology , immunology , surgery , mast cell
Abstract Introduction Ketamine is a commonly used analgesic agent in the management of both acute and chronic pain. While dose‐dependent side effects are well described, allergy to ketamine is extremely rare. Case A 41‐year‐old woman with chronic pelvic pain and previous ketamine exposure developed a widespread urticarial rash and mild perioral edema following the initiation of a ketamine infusion. The infusion was ceased and the patient was treated with oral antihistamine, with rapid resolution of symptoms. Serum tryptase levels were elevated at 2 and 6 hours after the infusion was ceased, and subsequent intradermal skin testing supported the diagnosis of type I hypersensitivity reaction to ketamine. Discussion This case represents a likely immunoglobulin E‐mediated type I hypersensitivity reaction to ketamine, supported by elevated tryptase levels and positive intradermal skin testing. The interpretation of these results and likely mechanism of the hypersensitivity reaction are described. The patient and treating team were advised against subsequent use of ketamine, due to the risk of serious adverse systemic reaction with repeat exposure.