Which drug class inhibits platelet aggregation similarly to a coagulant?

• A. Immunosuppressant
• B. Platelet Inhibitor
• C. Lipid-Lowering Agent
• D. Thyroid Hormone

Answer: (B)

The main idea here is how drugs affect clot formation by acting on platelets. Platelet aggregation inhibitors directly block the platelets’ ability to stick together, which is the first step in forming a clot. By preventing platelets from clumping, these drugs reduce the likelihood of a thrombosis forming. Therefore, the class that best fits “inhibits platelet aggregation” is platelet inhibitors, because their primary action is to interfere with platelet activation and aggregation pathways.

Immunosuppressants don’t specifically prevent platelets from clumping; they dampen immune responses. Lipid-lowering agents focus on reducing cholesterol and plaque burden rather than directly affecting platelet function. Thyroid hormones influence metabolism and broader physiological processes, not platelet aggregation. Some drugs in other categories can have minor effects on platelets, but they are not categorized by their primary antiplatelet mechanism.