Emergency Care and Transportation of the Sick and Injured ...

a. Ondansetron (Zofran), 0.4 mg IV/IO/IM. i. Administer slowly over at least 2 minutes. b. Diphenhydramine (Benadryl), 10 to 50 mg IV/IO/IM. i. Can cause drowsiness and a drop in blood pressure. c. Hydroxyzine (Vistaril), 25 to 100 mg IM. i. Increases CNS depressive effects of other medications. d. Promethazine (Phenergan) 12.5 to 25 mg IV/IO ... ................
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