Which statement about aspirin and suspected internal bleeding is correct?

Which statement about aspirin and suspected internal bleeding is correct?

• A. It reduces swelling in injured joints
• B. It increases blood clot formation
• C. It has no effect on bleeding risks
• D. It inhibits platelet aggregation

Answer: (D)

Aspirin’s effect on bleeding comes from its impact on platelets. It works by irreversibly inhibiting an enzyme in platelets (COX-1), which stops the production of thromboxane A2, a signal that tells platelets to clump together. Because platelets are essential for forming the first plug that stops bleeding, aspirin makes it harder for bleeding to stop. That’s why its action is to inhibit platelet aggregation, a mechanism that directly raises bleeding risk in cases of suspected internal bleeding. The other statements miss this key point: aspirin does not increase clot formation (it reduces it), and its relevance here isn’t about reducing swelling—though it can have anti-inflammatory effects, the question focuses on bleeding risk. It also does have an effect on bleeding risk, so saying there’s no effect is incorrect.

Aspirin’s effect on bleeding comes from its impact on platelets. It works by irreversibly inhibiting an enzyme in platelets (COX-1), which stops the production of thromboxane A2, a signal that tells platelets to clump together. Because platelets are essential for forming the first plug that stops bleeding, aspirin makes it harder for bleeding to stop. That’s why its action is to inhibit platelet aggregation, a mechanism that directly raises bleeding risk in cases of suspected internal bleeding.

The other statements miss this key point: aspirin does not increase clot formation (it reduces it), and its relevance here isn’t about reducing swelling—though it can have anti-inflammatory effects, the question focuses on bleeding risk. It also does have an effect on bleeding risk, so saying there’s no effect is incorrect.