title: Anaphylactoid reaction to rattlesnake envenomation.
abstract: The clinical manifestations of an anaphylactoid reaction are identical to true anaphylaxis; however, a previous exposure to the offending agent is not needed to manifest these symptoms. We present a case of an anaphylactoid reaction in a 62-y-o female following a first-time envenomation by a rattlesnake. The patient required s.c. epinephrine and i.v. diphenhydramine, methylprednisolone, and ranitidine. She had not been envenomated by a rattlesnake previously or received any horse-derived antivenins in the past.
authors.affiliation: California Poison Control System-San Diego, Division of Medical Toxicology, Emergency Medicine, University of California 92103-8025, USA.
authors.forename: S P
authors.initials: SP
authors.lastname: Nordt
mesh_terms: D000707:Anaphylaxis / Q000188:drug therapy / Q000209:etiology*; D000818:Animals; D018926:Anti-Allergic Agents / Q000627:therapeutic use; D000997:Antivenins / Q000627:therapeutic use; D003435:Crotalid Venoms / Q000009:adverse effects*; D017839:Crotalus; D004155:Diphenhydramine / Q000627:therapeutic use; D004837:Epinephrine / Q000627:therapeutic use; D005260:Female; D006801:Humans; D008875:Middle Aged; D012909:Snake Bites / Q000150:complications* / Q000628:therapy
chemical_list: D018926:Anti-Allergic Agents; D000997:Antivenins; D003435:Crotalid Venoms; D004155:Diphenhydramine; D004837:Epinephrine