Do systemic anticoagulants affect Arista AH effectiveness?

• A. Arista AH's effect is negated by systemic anticoagulation.
• B. Arista AH works systemically to promote coagulation.
• C. Arista AH acts locally at the bleeding site and systemic anticoagulation does not negate its local hemostatic effect, though continued bleeding may require additional measures.
• D. Arista AH has no effect on bleeding in patients on anticoagulants.

Answer: (C)

Arista AH is a topical hemostatic agent that works at the bleeding site by forming a physical matrix that concentrates platelets and clotting factors to support clot formation. Because its action is local, it does not rely on the body's systemic coagulation pathways in the same way as circulating clotting factors. Therefore, systemic anticoagulation does not negate its local hemostatic effect. If bleeding persists, additional measures—such as continued pressure, suturing, or addressing anticoagulation—may be needed. The other statements imply systemic action or complete ineffectiveness in anticoagulated patients, which isn’t accurate; Arista AH provides local control even when systemic anticoagulants are present.