VTNE Pharmacology Practice Questions 2026 - 20 Free Q&As with Explanations
Test your VTNE pharmacology knowledge with 20 free scenario-based practice questions covering drug classes, dosage calculations, controlled substances, and reversal agents, each with a detailed explanation.
Pharmacology is one of the largest VTNE domains, making up roughly 13% of the exam (about 20 questions). It tests your ability to classify drugs, calculate accurate doses in milligrams per kilogram, recognize controlled substance schedules, and select the correct reversal agent in an emergency. These 20 free scenario-based practice questions with full explanations will sharpen those skills.
Domain Quick Facts
- Exam weight: 13% of VTNE (~20 questions)
- Key topics: drug classification, mg/kg dosage calculations, DEA controlled substance schedules, routes of administration, drug interactions, reversal agents, species-specific restrictions, CRI calculations
- Difficulty: Hard - dosage math and reversal agents trip up many candidates
- Study tip: Memorize the reversal-agent pairs and practice mg/kg math until it is automatic.
20 Free VTNE Pharmacology Practice Questions
Each question below mirrors the real VTNE format: four-option multiple choice with a detailed explanation. Work through them in order, then check your answers.
Question 1 of 20 - Reversal Agents
A dog sedated with dexmedetomidine becomes severely bradycardic, and the veterinarian asks you to draw up the reversal agent. Which drug should you prepare?
Correct Answer: B) Atipamezole
Atipamezole is the specific alpha-2 antagonist used to reverse dexmedetomidine and medetomidine. Naloxone reverses opioids and flumazenil reverses benzodiazepines, so neither applies. Yohimbine is an older alpha-2 antagonist used mainly for xylazine, not the preferred reversal for dexmedetomidine.
Question 2 of 20 - Dosage Calculation
A 20 kg dog is prescribed carprofen at 2.2 mg/kg. The tablets are 25 mg each. How many tablets per dose (nearest half tablet)?
Correct Answer: C) 2 tablets
20 kg times 2.2 mg/kg equals 44 mg, divided by 25 mg per tablet equals 1.76 tablets, which rounds to 2. One tablet would underdose and 2.5 would overdose, so 2 is the nearest correct half-tablet.
Question 3 of 20 - Controlled Substances
You are restocking the controlled drug safe. Which drug is classified as a DEA Schedule II controlled substance?
Correct Answer: C) Fentanyl
Fentanyl is a Schedule II opioid due to high abuse potential with accepted medical use. Diazepam and butorphanol are Schedule IV, and buprenorphine is Schedule III, all of which carry lower abuse potential.
Question 4 of 20 - Species Restrictions
An owner reports giving their cat a human medication for pain. Which drug is most dangerous because cats lack the enzyme to metabolize it, causing methemoglobinemia and liver failure?
Correct Answer: A) Acetaminophen
Cats have deficient glucuronidation and cannot safely metabolize acetaminophen, leading to methemoglobinemia and hepatic necrosis. Famotidine, diphenhydramine, and maropitant are used in cats under veterinary direction without this lethal risk.
Question 5 of 20 - Drug Classification
A veterinarian orders an NSAID for postoperative inflammation. Which drug belongs to the NSAID class?
Correct Answer: B) Meloxicam
Meloxicam is a non-steroidal anti-inflammatory drug that inhibits cyclooxygenase. Prednisone is a corticosteroid, cephalexin is an antibiotic, and maropitant is an antiemetic.
Question 6 of 20 - Drug Interactions
A dog is receiving prednisone and the veterinarian wants to add pain medication. Which combination should you flag as dangerous due to additive gastrointestinal ulceration risk?
Correct Answer: C) Prednisone plus carprofen
Combining a corticosteroid with an NSAID such as carprofen sharply increases the risk of gastrointestinal ulceration and perforation and is contraindicated. The other combinations do not share this ulcerogenic interaction.
Question 7 of 20 - Routes of Administration
A drug must be given by the route with the fastest onset, reserved for emergencies. Which route is this?
Correct Answer: C) Intravenous
The intravenous route delivers a drug directly into circulation for the fastest onset, which is why it is preferred in emergencies. The other routes require absorption and produce slower, more variable onset.
Question 8 of 20 - CRI Calculation
A 10 kg dog needs a lidocaine CRI at 50 mcg/kg/min. What is the total dose delivered per minute?
Correct Answer: C) 500 mcg/min
50 mcg/kg/min times 10 kg equals 500 mcg/min. Answer A ignores body weight, B uses 5 kg, and D adds an extra zero.
Question 9 of 20 - Opioid Reversal
A patient given hydromorphone develops respiratory depression. Which reversal agent should you have ready?
Correct Answer: B) Naloxone
Naloxone is a pure opioid antagonist that reverses opioid-induced respiratory depression. Atipamezole reverses alpha-2 agonists, flumazenil reverses benzodiazepines, and dantrolene treats malignant hyperthermia.
Question 10 of 20 - Antifungals
A cat with a dermatophyte infection is prescribed an oral antifungal. Which drug is an antifungal?
Correct Answer: A) Itraconazole
Itraconazole is an azole antifungal effective against dermatophytes. Enrofloxacin is a fluoroquinolone antibiotic, metronidazole is an antiprotozoal and antibacterial, and amoxicillin is a penicillin antibiotic.
Question 11 of 20 - Drug Storage
You receive a shipment of insulin. How should it be stored to maintain potency?
Correct Answer: B) Refrigerated and protected from agitation
Insulin must be refrigerated and handled gently because freezing and vigorous shaking denature the protein and destroy potency. Room-temperature light exposure and desiccant storage do not protect insulin.
Question 12 of 20 - Anticholinergics
A premedicated patient becomes bradycardic and the veterinarian orders an anticholinergic to raise heart rate. Which drug is appropriate?
Correct Answer: B) Atropine
Atropine is an anticholinergic that blocks vagal tone and raises heart rate. Acepromazine is a tranquilizer, morphine is an opioid that can worsen bradycardia, and midazolam is a benzodiazepine.
Question 13 of 20 - Species Restrictions
A client with a pet rabbit asks about a parasite product. Which agent must be used cautiously because high doses can be neurotoxic in rabbits?
Correct Answer: A) Ivermectin at high doses
High doses of ivermectin can cross into the central nervous system and cause neurotoxicity, so dosing in rabbits must be careful. The other options do not carry this specific neurotoxic concern.
Question 14 of 20 - Benzodiazepine Reversal
A patient sedated with midazolam remains excessively sedated and the veterinarian wants to reverse the benzodiazepine. Which drug do you prepare?
Correct Answer: C) Flumazenil
Flumazenil is the specific antagonist that reverses benzodiazepines such as midazolam and diazepam. Naloxone reverses opioids, atipamezole reverses alpha-2 agonists, and glycopyrrolate is an anticholinergic.
Question 15 of 20 - Dosage Calculation
A 5 kg cat is prescribed amoxicillin at 10 mg/kg. The suspension is 50 mg/mL. How many milliliters do you administer?
Correct Answer: B) 1.0 mL
5 kg times 10 mg/kg equals 50 mg, divided by 50 mg/mL equals 1.0 mL. The other answers result from using the wrong concentration.
Question 16 of 20 - Drug Classification
A dog needs an antibiotic from the fluoroquinolone class. Which drug should you expect?
Correct Answer: A) Enrofloxacin
Enrofloxacin is a fluoroquinolone. Cephalexin is a cephalosporin, doxycycline is a tetracycline, and clindamycin is a lincosamide.
Question 17 of 20 - Steroids
A dog on long-term prednisone abruptly stops the medication. Why is gradual tapering necessary?
Correct Answer: B) It avoids adrenal insufficiency from suppression of the adrenal axis
Long-term corticosteroids suppress the hypothalamic-pituitary-adrenal axis, so abrupt withdrawal can cause an Addisonian crisis. Tapering lets the adrenal glands resume normal cortisol production. The other options are not the reason for tapering.
Question 18 of 20 - Controlled Substances
You notice a discrepancy in the ketamine log. Under which DEA schedule is ketamine classified?
Correct Answer: C) Schedule III
Ketamine is a Schedule III controlled substance. Schedule I drugs have no accepted medical use, Schedule II is for high-abuse drugs like fentanyl, and Schedule V has the lowest abuse potential.
Question 19 of 20 - Drug Classification
A dog is prescribed a medication described as an opioid. Which drug fits this classification?
Correct Answer: B) Hydromorphone
Hydromorphone is a full mu-opioid agonist. Furosemide is a loop diuretic, cefazolin is a cephalosporin antibiotic, and famotidine is an H2 blocker.
Question 20 of 20 - Dosage Calculation
A 30 kg dog needs cefazolin at 22 mg/kg IV before surgery. How many total milligrams should you draw up?
Correct Answer: C) 660 mg
30 kg times 22 mg/kg equals 660 mg. The other answers come from using an incorrect body weight or dose rate.
How to Score Yourself
- 18-20 correct: Excellent - this domain is a strength
- 14-17 correct: Good - review the questions you missed
- 10-13 correct: Needs work - dedicate extra study time to this domain
- Below 10: Priority domain - start with the study guide below
Key Pharmacology Topics to Master for the VTNE
Reversal agents are among the highest-yield pharmacology facts on the VTNE. Lock in the three core pairs: naloxone reverses opioids, atipamezole reverses alpha-2 agonists such as dexmedetomidine and medetomidine, and flumazenil reverses benzodiazepines such as midazolam and diazepam.
Dosage calculations appear repeatedly, so practice the formula until it is second nature: dose in mg/kg multiplied by body weight in kg gives total milligrams, then divide by the concentration to get volume in milliliters. For constant rate infusions, the per-minute dose equals the rate in mcg/kg/min multiplied by body weight.
Controlled substance scheduling is a frequent test item. Schedule II includes high-abuse drugs with medical use such as fentanyl and hydromorphone, Schedule III includes ketamine and buprenorphine, Schedule IV includes diazepam and butorphanol, and Schedule V has the lowest abuse potential.
Never forget the species-specific danger zones. Cats cannot safely metabolize acetaminophen and are sensitive to many NSAIDs, while rabbits are vulnerable to neurotoxicity from high-dose ivermectin. Combining NSAIDs with corticosteroids in any species risks severe gastrointestinal ulceration.
VTNE Pharmacology FAQ
How many pharmacology questions are on the VTNE?
Pharmacology makes up about 13% of the VTNE, which is roughly 20 of the 150 scored questions.
What is the most important pharmacology topic to study?
Reversal-agent pairs and mg/kg dosage calculations are the highest-yield topics and appear on nearly every exam form.
Do I need to memorize DEA schedules for the VTNE?
Yes. You should know which common veterinary drugs fall under Schedules II through V, since controlled substance handling is tested directly.
Are dosage calculations done with a calculator?
An on-screen calculator is provided during the exam, but you must understand the formula and unit conversions to set up the problem correctly.
Ready for 5,000+ VTNE Practice Questions?
Track your progress by domain and identify weak areas instantly.
Start Free Trial