What drug class is used to decrease blood clotting?AntipsychoticsAnticoagulantsAntihypertensivesAnticonvulsants

The drug class used to decrease blood clotting is Anticoagulants.

Anticoagulants are medications that help prevent blood clots from forming or growing larger. They are commonly used in the treatment and prevention of thrombosis, which can lead to conditions like stroke, heart attack, and venous thromboembolism. Some well-known examples of anticoagulants include warfarin, heparin, and direct oral anticoagulants (DOACs) such as rivaroxaban and apixaban.

In contrast, antipsychotics are used to manage psychiatric conditions, antihypertensives lower blood pressure, and anticonvulsants treat seizure disorders. Therefore, the correct answer is Anticoagulants.