Which of the following is NOT part of the diagnostic method for choosing a drug?

The selection of a drug for treatment is typically based on a comprehensive diagnostic method that includes several key components. Practical experience, while valuable in the context of a veterinarian's overall ability to choose effective treatments, is not formally part of the diagnostic method as a systematic approach to drug selection.

In the diagnostic process, assessing the patient is critical because it allows the veterinarian to evaluate the animal's specific clinical signs and overall health status. This step helps in identifying the underlying condition that needs treatment.

Obtaining a history is equally important, as it provides context about the animal's previous health issues, treatments, medications, and lifestyle, which can significantly influence the choice of therapy.

Performing lab tests is also a fundamental part of the diagnostic process. Lab tests can help confirm a diagnosis, rule out certain conditions, and provide quantitative data that inform the choice of medication.

By contrast, while practical experience aids veterinarians in their overall judgment and decision-making, it is not a structured part of the diagnostic method for choosing a drug, which is grounded in specific assessments and measurements.