Contra Costa County

DIPHENHYDRAMINE 1 mg/kg IV (maximum dose of 50 mg) if IV already established. Consider decreased dose (0.5 mg/kg) if patient has taken PO diphenhydramine. In the absence of respiratory symptoms, DIPHENHYDRAMINE 1 mg/kg IM (maximum dose of 50 mg). Consider decreased dose (0.5 mg/kg… ................
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