What medication do you anticipate for a patient with a pulmonary embolism?

• A. Heparin
• B. Warfarin
• C. Aspirin
• D. Fibrinolytics

Answer: (A)

Rapid anticoagulation is essential in acute pulmonary embolism to stop clot growth and allow the body's natural clot-lysing processes to work. Heparin fits this need because it acts immediately when given IV or subcutaneously, providing quick anticoagulation. Its effect is rapidly reversible with protamine sulfate if bleeding occurs, and its intensity can be precisely monitored and adjusted to keep the patient safe while you plan longer-term therapy.

Warfarin, while effective for long-term prevention, takes several days to reach therapeutic levels and isn’t reliable for immediate stabilization; it’s usually started after initial heparin or used alongside it with careful monitoring. Aspirin isn’t sufficient for venous thromboembolism like PE, since it doesn’t adequately prevent clot propagation. Fibrinolytics actively dissolve clots and are reserved for the most unstable cases with massive PE, due to a higher risk of serious bleeding, so they’re not the standard first-line choice for all PE patients.