Incidence of anaphylactic self-treatment in an outpatient population.
Insect-allergic and food-allergic patients with a history of previous anaphylactic reactions were retrospectively and prospectively evaluated for incidence of self-administration of epinephrine or antihistamines. Participants were prescribed either Ana-KitR or Epi-PenR dosage forms. In 33 patients, 82 incidents were noted during 1,252 patient-months, an average of 0.78 incidents per patient-year (PPY). A mean of 0.38 epinephrine uses PPY was recorded, ranging from 0 to 2.82 doses PPY. Antihistamine uses averaged 0.69 PPY, ranging from 0 to 4.47 doses PPY. Antihistamines alone quelled reactions in 13 of 17 incidents involving Ana-Kits. Food-allergic patients were more likely to self-medicate, with 1.93 anti-allergic drug uses PPY, compared with 0.49 uses PPY for insect-allergic patients. Six of 22 insect-related epinephrine uses occurred during winter months. No statistically significant difference was noted between drug administration rates determined retrospectively and prospectively.
Grabenstein
J D
JD
Pharmacy Service, Walter Reed Army Medical Center, Washington, DC.
Smith
L J
LJ
D000707:Anaphylaxis / Q000188:drug therapy*; D004837:Epinephrine / Q000008:administration & dosage*; D005512:Food Hypersensitivity / Q000188:drug therapy; D006634:Histamine H1 Antagonists / Q000008:administration & dosage*; D006801:Humans; D006967:Hypersensitivity / Q000188:drug therapy*; D007299:Insect Bites and Stings / Q000188:drug therapy; D010044:Outpatient Clinics, Hospital; D011446:Prospective Studies; D012189:Retrospective Studies; D012646:Self Administration / Q000706:statistics & numerical data
D006634:Histamine H1 Antagonists; D004837:Epinephrine