Drugs that dissolve preformed clots are not called anticoagulants but instead are referred to as:

A. vasodilators
B. vasoconstrictors
C. coagulants
D. thrombolytic agents

d
Rationale: Drugs that dissolve preformed clots (thrombolytic agents or tissue plasminogen activators) are not referred to as anticoagulants. They include streptokinase and urokinase.