Medication monitoring can have many components. It can involve testing the levels of a drug in your pet’s blood to ensure that those levels are high enough to be effective, but not too high (which may cause problems or side effects). It may include discussing your pet’s medical history to help ensure that your pet is not experiencing any unwanted side effects from a medication. It may also involve having your veterinarian examine your pet periodically to ensure that the clinical signs associated with the illness being treated are responding appropriately to therapy.