Antiplatelet therapy prevents platelets from clumping to form a clot.

• A. Prevent platelets from clumping to form a clot
• B. Promote coagulation by activating clotting factors
• C. Reduce blood volume
• D. Dissolve existing clots

Answer: (A)

Antiplatelet therapy works by blocking platelet activation and aggregation, which are the initial steps that lead to the formation of a platelet plug at a damaged vessel. By preventing platelets from sticking together, these drugs reduce the likelihood of arterial clots forming. This is different from drugs that promote coagulation by activating clotting factors (anticoagulants slow or interrupt the coagulation cascade) or from drugs that dissolve clots (thrombolytics break down existing fibrin networks). It also doesn’t change blood volume. So the statement that antiplatelet therapy prevents platelets from clumping to form a clot is the best description.