بعد دقائق من بدء مضاد حيوي وريدي، صار عند مريضة بالغة صفير وتورم في الشفاه وطفح منتشر وضغطها ٧٨/٤٠. أوقفت الممرضة التسريب. ما الدواء والجرعة الصحيحة الآن؟

Minutes after an IV antibiotic is started, an adult client develops wheeze, lip swelling, a widespread rash and BP 78/40. The nurse has stopped the infusion. Which drug and dose are correct now?

1. Adrenaline 0.5 mg subcutaneously in the arm
2. Diphenhydramine 50 mg IV before any other drug
3. Adrenaline 0.5 mg (1 mg/mL) IM in the outer thigh
4. Adrenaline 1 mg (0.1 mg/mL) as an IV push

Answer: C) Adrenaline 0.5 mg (1 mg/mL) IM in the outer thigh. First-line treatment for anaphylaxis is IM adrenaline 1 mg/mL, 0.5 mg for an adult in the anterolateral thigh, repeated after 5 minutes if needed. The 1 mg IV dose is for cardiac arrest only, subcutaneous absorption is slower, and antihistamines are not life-saving.