YHOVN 2 năm trước

dị ứng với thuốc cản quang a—dự phòng

TABLE 11.1. Anaphylaxis and Contrast Dye Reactions*—Prophylaxis
Agent	Dosage	Time Prior to Exposure
Prednisone or Hydrocortisone Diphenhydramine ^-blocker* Ephedrine (optional)	50 mg PO 100 mg IV 50 mg PO or IV See below 25 mg PO	13h,7h, and 1 h prior to exposure 13 h, 7 h, and 1 h prior to exposure 13 h and 1 h prior to exposure 1 h prior to exposure
IV, intravenous; PO, by mouth Note: Consider for patients with prior history of dye reaction; may also consider use of nonionic contrast material aThis regimen also appropriate for other prophylactic situations. bRanitidine: 150 mg PO or 50 mg IV Famotidine: 20 mg PO/IV Cimetidine: 300 mg PO/IV