Drugs used to prevent the clotting of blood are:

Anticoagulants are medications that prevent blood from clotting. They are commonly prescribed for

conditions like atrial fibrillation, deep vein thrombosis, and pulmonary embolism to prevent the

formation of harmful clots. Examples of anticoagulants include warfarin, heparin, and direct oral

anticoagulants (DOACs).

Analgesics: Used to relieve pain.

Tranquilizers: Used to reduce anxiety or induce sleep.

Reference:

"Anticoagulants." MedlinePlus, https://medlineplus.gov/anticoagulants.html