How many NTG doses may be given?

• A. 1
• B. 2
• C. 3
• D. 4

Answer: (C)

Nitroglycerin dosing is limited to three sublingual doses in the prehospital setting. The idea is to give a small, fast-acting nitrate to relieve chest pain without risking significant hypotension. Each dose is typically 0.4 mg, given at 5-minute intervals, and you proceed only if the patient remains hemodynamically stable and has no contraindications. If the pain persists after three doses, continue transport and consider other treatments rather than giving more nitroglycerin. This approach balances effectiveness with safety, hence the maximum of three doses.