Free Veterinary Pharmacology MCQs with Answers
60 Veterinary Pharmacology MCQs from Veterinary Science, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Covers how drugs act in animals, including pharmacokinetics, pharmacodynamics, routes of administration, dosage forms, adverse effects and drug interactions. Major groups include antimicrobials, antiparasitics, analgesics, anaesthetics, anti-inflammatory drugs, hormones and cardiovascular medicines, with attention to withdrawal periods and species differences.
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60 questions · page 1 of 3
- A. Zero-order elimination
- B. First-order elimination
- C. Passive diffusion
- D. Renal filtration
Explanation: Zero-order elimination removes a fixed amount of drug per unit time. First-order elimination removes a constant fraction of the drug, so…
Correct answer: Zero-order elimination- A. Time-dependent killing
- B. Concentration-dependent killing
- C. Bacteriostatic activity only
- D. pH-dependent inhibition
Explanation: Aminoglycosides kill bacteria more effectively when higher peak concentrations are achieved relative to the pathogen's MIC.
Correct answer: Concentration-dependent killing- A. Blocking folate synthesis
- B. Inhibiting bacterial cell-wall formation
- C. Opening glutamate-gated chloride channels
- D. Blocking parasite tubulin assembly
Explanation: Ivermectin increases chloride ion entry through glutamate-gated chloride channels in invertebrates, causing paralysis and death.
Correct answer: Opening glutamate-gated chloride channels- A. Ketamine
- B. Propranolol
- C. Furosemide
- D. Atropine
Explanation: Atropine competitively blocks muscarinic acetylcholine receptors and reduces salivation, bronchial secretions, bradycardia and…
Correct answer: Atropine- A. Time-dependent killing
- B. Concentration-dependent killing
- C. Delayed receptor antagonism
- D. Dose-independent killing
Explanation: The effectiveness of beta-lactams is mainly related to the time that free drug concentration remains above the pathogen's MIC.
Correct answer: Time-dependent killing- A. Alpha-1 adrenergic receptors
- B. Alpha-2 adrenergic receptors
- C. Beta-1 adrenergic receptors
- D. Muscarinic receptors
Explanation: Xylazine is an alpha-2 adrenergic agonist that reduces norepinephrine release and produces sedation, analgesia and muscle relaxation.
Correct answer: Alpha-2 adrenergic receptors- A. Neostigmine
- B. Pilocarpine
- C. Atropine
- D. Bethanechol
Explanation: Atropine blocks excessive stimulation of muscarinic receptors and is the main treatment for salivation, bronchoconstriction and…
Correct answer: Atropine- A. Urine flow rate
- B. Renal clearance
- C. Elimination half-life alone
- D. Volume of distribution
Explanation: Loading dose is based mainly on the target concentration and volume of distribution, with adjustment for bioavailability when the route is…
Correct answer: Volume of distribution- A. Gastrointestinal ulceration
- B. Severe hypoglycemia
- C. Permanent mydriasis
- D. Increased red-cell production
Explanation: Inhibition of cyclooxygenase reduces protective gastrointestinal prostaglandins and may cause ulceration or bleeding.
Correct answer: Gastrointestinal ulceration- A. Sheep
- B. Horse
- C. Goat
- D. Camel
Explanation: Horses are highly sensitive to ionophore toxicity, which can cause severe myocardial and skeletal muscle damage.
Correct answer: Horse- A. Oral administration
- B. Intramuscular administration
- C. Intravenous administration
- D. Subcutaneous administration
Explanation: Intravenous administration places the entire dose directly into the bloodstream, giving 100% systemic bioavailability.
Correct answer: Intravenous administration- A. Plasma water only
- B. Extracellular fluid only
- C. Renal filtrate
- D. Body tissues
Explanation: A large volume of distribution indicates that much of the drug leaves the plasma and enters tissues.
Correct answer: Body tissues- A. Half-life
- B. Clearance
- C. Bioavailability
- D. Volume of distribution
Explanation: The elimination half-life is the time needed for the plasma drug concentration to fall by half.
Correct answer: Half-life- A. Acepromazine
- B. Naloxone
- C. Flumazenil
- D. Atipamezole
Explanation: Naloxone competitively blocks opioid receptors and can rapidly reverse opioid-induced respiratory depression.
Correct answer: Naloxone- A. Inhibition of bacterial cell membrane formation
- B. Direct stimulation of bacterial ribosomes
- C. Sequential blockade of folate synthesis
- D. Prevention of viral nucleic acid release
Explanation: Trimethoprim and sulfonamides inhibit successive steps in bacterial folate synthesis.
Correct answer: Sequential blockade of folate synthesis- A. It causes permanent renal calcification
- B. It blocks growth hormone secretion
- C. It produces irreversible auditory blindness
- D. It may damage developing articular cartilage
Explanation: Fluoroquinolones, including enrofloxacin, may damage developing articular cartilage in young animals.
Correct answer: It may damage developing articular cartilage- A. Paracetamol
- B. Meloxicam
- C. Carprofen
- D. Buprenorphine
Explanation: Cats have limited capacity to glucuronidate paracetamol, allowing toxic metabolites to accumulate.
Correct answer: Paracetamol- A. Halothane
- B. Isoflurane
- C. Diethyl ether
- D. Chloroform
Explanation: Isoflurane has relatively low blood-gas solubility, so changes in inspired concentration produce fairly rapid changes in anaesthetic…
Correct answer: Isoflurane- A. Proximal convoluted tubule
- B. Distal convoluted tubule
- C. Thick ascending loop of Henle
- D. Collecting duct
Explanation: Furosemide blocks the sodium-potassium-2 chloride cotransporter in the thick ascending limb of the loop of Henle.
Correct answer: Thick ascending loop of Henle- A. To prevent bacterial drug resistance in the patient
- B. To prevent all adverse effects during treatment
- C. To increase the drug concentration in edible tissues
- D. To allow drug residues in food products to fall below safe limits
Explanation: A withdrawal period allows residues in meat, milk, eggs, or honey to decline below legally permitted safety limits.
Correct answer: To allow drug residues in food products to fall below safe limitsVeterinary Pharmacology MCQs: common questions
Are these Veterinary Pharmacology MCQs free?
Yes. All Veterinary Pharmacology MCQs from Veterinary Science are free on TestUstad, with unlimited attempts and no account needed. Nothing on this page is a sample or a trial.
How many Veterinary Pharmacology MCQs are on this page?
There are 60 Veterinary Pharmacology MCQs in the Veterinary Science bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Veterinary Pharmacology MCQ have an explanation?
Yes. Each Veterinary Pharmacology question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
Can I take a timed Veterinary Pharmacology test?
Yes. The practice button on this page starts a free Veterinary Pharmacology test drawn from the Veterinary Science bank. It marks each answer instantly, gives you a score at the end, and can be retaken as many times as you like.