CVA Veterinary Pharmacology 4

Question 1

Which drug class is commonly used to treat hyperthyroidism in cats by blocking thyroid hormone synthesis?

Accepted Answer

Thiamazole (methimazole)

Answer

Methimazole (brand name Tapazole or Felimazole) inhibits thyroid peroxidase, reducing synthesis of T3 and T4 in hyperthyroid cats.

Question 2

A dog is prescribed phenobarbital for seizure control. Which organ's function must be monitored regularly due to long-term use?

Accepted Answer

Liver

Answer

Phenobarbital is hepatically metabolized and can cause hepatotoxicity with chronic use, requiring regular liver enzyme monitoring.

Question 3

What is the primary mechanism of action of omeprazole in veterinary patients?

Accepted Answer

Proton pump inhibitor

Answer

Omeprazole irreversibly inhibits the H+/K+ ATPase (proton pump) in gastric parietal cells, reducing acid secretion.

Question 4

Which controlled substance schedule classification applies to ketamine in the United States?

Accepted Answer

Schedule III

Answer

Ketamine is classified as a Schedule III controlled substance under the DEA, requiring proper record-keeping and secure storage.

Question 5

A cat receives acepromazine as a pre-anesthetic. Which side effect should the veterinary assistant monitor for?

Accepted Answer

Hypotension

Answer

Acepromazine causes vasodilation via alpha-1 adrenergic blockade, leading to hypotension, which is especially concerning in compromised patients.

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