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California RVT practice questions

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Question 1Pharmacy and Pharmacology

A veterinarian orders midazolam at 0.3 mg/kg IV for a 12 kg dog. The vial is labeled 5 mg/mL. How many milliliters should the technician draw up?

  1. 7.2 mL
  2. 0.72 mL Correct answer.
  3. 0.36 mL
  4. 1.8 mL

Explanation

First calculate the total dose: 0.3 mg/kg × 12 kg = 3.6 mg. Then divide by the concentration: 3.6 mg ÷ 5 mg/mL = 0.72 mL. Always verify the arithmetic against the patient's actual weight before administration.

Question 2Pharmacy and Pharmacology

Which route of drug administration completely bypasses first-pass hepatic metabolism?

  1. Oral
  2. Rectal (cranial portion)
  3. Intramuscular
  4. Intravenous Correct answer.

Explanation

Drugs given intravenously enter the systemic circulation directly and never pass through the portal vein before reaching target tissues. Oral drugs absorbed from the small intestine travel to the liver first, where metabolism reduces bioavailability.

Question 3Pharmacy and Pharmacology

A technician is preparing to administer a drug known to be a potent emetogenic chemotherapeutic agent to a canine patient. Which premedication strategy is most appropriate?

  1. Give the antiemetic only after vomiting begins
  2. Withhold all food and water for 24 hours
  3. Administer a prophylactic antiemetic such as maropitant before treatment Correct answer.
  4. Give an oral antacid one hour after the drug

Explanation

Anticipatory prophylaxis with an antiemetic such as maropitant, a NK1 receptor antagonist, is standard before emetogenic chemotherapy. Waiting for vomiting to start allows the patient to become dehydrated and uncomfortable.

Question 4Pharmacy and Pharmacology

Which drug class is maropitant, and what is its mechanism of action?

  1. NK1 receptor antagonist blocking substance P Correct answer.
  2. Dopamine D2 antagonist blocking dopamine
  3. 5-HT3 receptor antagonist blocking serotonin
  4. H1 receptor antagonist blocking histamine

Explanation

Maropitant is a neurokinin-1 (NK1) receptor antagonist that blocks the binding of substance P in the emetic center. This makes it effective against both central and peripheral causes of vomiting in dogs and cats.

Question 5Pharmacy and Pharmacology

A cat is prescribed a transdermal gel formulation of a medication. Which instruction is most important to give the owner?

  1. Apply the gel to the cat's flank where it can be licked off
  2. Wear gloves when applying and avoid skin contact with the gel Correct answer.
  3. Apply to the pinna and massage vigorously for two minutes
  4. Store the gel in the freezer between doses

Explanation

Transdermal gels often contain drugs that are hazardous to humans, so gloves and avoidance of skin contact are essential. The inner pinna is the usual application site and should not be vigorously massaged.

Question 6Pharmacy and Pharmacology

Which of the following best describes the term 'withdrawal time' as it applies to food-producing animals?

  1. The period a drug must be stopped before milk or meat can be marketed Correct answer.
  2. The time required for a drug to reach peak plasma concentration
  3. The interval between two consecutive doses of a drug
  4. The time a drug remains stable after the vial is opened

Explanation

Withdrawal time is the legally required interval between the last dose of a drug and the slaughter of the animal or sale of its milk or eggs. It ensures residues fall below established tolerance limits for human consumption.

Question 7Pharmacy and Pharmacology

A dog receiving long-term oral prednisone is being tapered off the drug. Why must the dose be reduced gradually?

  1. To prevent the development of antibiotic resistance
  2. To allow the adrenal cortex to resume endogenous cortisol production Correct answer.
  3. To avoid acute hepatic necrosis from drug accumulation
  4. To prevent rebound hypertension from vasoconstriction

Explanation

Prolonged glucocorticoid administration suppresses the hypothalamic-pituitary-adrenal axis, so the adrenal cortex atrophies. Abrupt withdrawal can precipitate an adrenal crisis, so the dose must be tapered to allow endogenous cortisol production to recover.

Question 8Pharmacy and Pharmacology

Which analgesic is contraindicated in cats because of a deficiency in glucuronidation that can cause fatal toxicity?

  1. Meloxicam
  2. Gabapentin
  3. Buprenorphine
  4. Acetaminophen Correct answer.

Explanation

Cats have limited glucuronidation capacity, so acetaminophen (paracetamol) accumulates and causes methemoglobinemia and hepatic necrosis. It should never be given to cats even in small amounts.

Question 9Pharmacy and Pharmacology

A patient is receiving a constant rate infusion of lidocaine. Which adverse effect should the technician monitor for most closely?

  1. Hyperkalemia and polyuria
  2. Bradycardia and hypotension Correct answer.
  3. Polyphagia and weight gain
  4. Hyperthermia and tachycardia

Explanation

Lidocaine toxicity in veterinary patients most commonly manifests as CNS signs and cardiovascular depression, including bradycardia and hypotension. Continuous ECG and blood pressure monitoring are essential during infusion.

Question 10Pharmacy and Pharmacology

Which of the following is the primary reason a veterinarian might prescribe a compounded formulation of a drug?

  1. A patient needs a dose or dosage form not commercially available Correct answer.
  2. Compounded drugs are required for all food animals
  3. Compounded drugs are always more potent than approved products
  4. Compounded drugs bypass FDA residue requirements

Explanation

Compounding allows a pharmacist or veterinarian to create a dose or dosage form tailored to an individual patient, such as a flavored liquid for a cat that will not take tablets. It is not a substitute for approved products when an appropriate one exists.

Question 11Pharmacy and Pharmacology

A 20 kg dog is prescribed amoxicillin at 11 mg/kg PO twice daily. The available suspension is 50 mg/mL. What volume should be given per dose?

  1. 2.2 mL
  2. 22 mL
  3. 0.44 mL
  4. 4.4 mL Correct answer.

Explanation

The total dose is 11 mg/kg × 20 kg = 220 mg. Dividing by 50 mg/mL gives 4.4 mL per dose. Double-checking the weight and concentration prevents tenfold errors.

Question 12Pharmacy and Pharmacology

A technician is asked to dispense a medication that requires a DEA order form (Form 222). Which schedule of controlled substance does this apply to?

  1. Schedule V only
  2. All controlled substances regardless of schedule
  3. Schedule II Correct answer.
  4. Schedule IV only

Explanation

Schedule II controlled substances require a DEA Form 222 for ordering and are subject to stricter recordkeeping than lower schedules. Schedule III through V substances are ordered using invoices with proper records retained.

Question 13Pharmacy and Pharmacology

Which drug interaction is most likely when a patient receives both a nonsteroidal anti-inflammatory drug and a corticosteroid?

  1. Enhanced antimicrobial efficacy
  2. Increased risk of gastrointestinal ulceration Correct answer.
  3. Decreased risk of bleeding
  4. Reduced renal blood flow leading to polyuria

Explanation

NSAIDs inhibit protective prostaglandin synthesis in the gastric mucosa, and corticosteroids impair mucosal healing, so combining them substantially increases the risk of GI ulceration and perforation. This combination is generally avoided.

Question 14Pharmacy and Pharmacology

A cat with hypertrophic cardiomyopathy is prescribed atenolol. Which monitoring parameter is most relevant to assess the drug's effect?

  1. Heart rate and blood pressure Correct answer.
  2. Urine specific gravity
  3. Serum amylase
  4. Body temperature

Explanation

Atenolol is a beta-1 selective blocker that slows heart rate and reduces myocardial oxygen demand, so heart rate and blood pressure are the key monitoring parameters. Excessive bradycardia may require dose adjustment.

Question 15Pharmacy and Pharmacology

Which of the following describes the mechanism of action of omeprazole?

  1. Irreversibly inhibits the gastric proton pump Correct answer.
  2. Blocks H2 receptors on parietal cells
  3. Neutralizes gastric acid chemically
  4. Coats the gastric mucosa to form a barrier

Explanation

Omeprazole is a proton pump inhibitor that irreversibly binds the H+/K+-ATPase pump on parietal cells, suppressing acid secretion. Its effect lasts until new pumps are synthesized.

Question 16Pharmacy and Pharmacology

A dog is receiving chemotherapy with doxorubicin. Which safety precaution is most important for the technician handling the drug?

  1. Use a closed-system transfer device and full PPE Correct answer.
  2. Prepare the drug in an open room with the door propped
  3. Dispose of waste in regular trash after dilution
  4. Handle the drug with bare hands to improve dexterity

Explanation

Doxorubicin is a hazardous cytotoxic drug, so handling requires a closed-system transfer device, gloves, gown, and eye protection. Waste must go into designated hazardous pharmaceutical containers.

Question 17Pharmacy and Pharmacology

Which of the following best explains why a drug's half-life is clinically important?

  1. It determines the color of the drug solution
  2. It predicts the drug's cost
  3. It guides the dosing interval to maintain therapeutic levels Correct answer.
  4. It indicates the drug's storage temperature

Explanation

Half-life is the time required for plasma concentration to fall by half, and it informs how often a drug should be dosed to stay within the therapeutic window. Drugs with short half-lives generally require more frequent dosing or a constant rate infusion.

Question 18Pharmacy and Pharmacology

A patient is prescribed enrofloxacin. Which statement about its use in growing animals is correct?

  1. It can cause cartilage damage in growing animals and should be used cautiously Correct answer.
  2. It has no effect on cartilage
  3. It is safe in all growing animals at any dose
  4. It is the drug of choice for young puppies with any infection

Explanation

Fluoroquinolones such as enrofloxacin can damage articular cartilage in growing animals, so they are used cautiously in young or large-breed puppies. They are also associated with retinal toxicity in cats at high doses.

Question 19Pharmacy and Pharmacology

A technician is calculating a dose for a 5 kg cat and the drug label states 2 mg/kg. The concentration is 10 mg/mL. What volume is needed?

  1. 1.0 mL Correct answer.
  2. 2.0 mL
  3. 0.5 mL
  4. 0.1 mL

Explanation

The dose is 2 mg/kg × 5 kg = 10 mg. Dividing by 10 mg/mL gives 1.0 mL. Verifying the units ensures the correct volume is drawn.

Question 20Pharmacy and Pharmacology

Which of the following is a characteristic adverse effect of aminoglycoside antibiotics such as gentamicin?

  1. Nephrotoxicity and ototoxicity Correct answer.
  2. Bone marrow suppression only
  3. Hepatotoxicity and photosensitivity
  4. Hyperkalemia and hypertension

Explanation

Aminoglycosides can damage the proximal renal tubules and the vestibular or cochlear apparatus, so renal function and hearing should be monitored. Adequate hydration and careful dosing reduce the risk.

Question 21Pharmacy and Pharmacology

A dog with a history of seizures is being started on phenobarbital. Which monitoring plan is most appropriate?

  1. Monitor only for weight gain
  2. Check blood glucose only once at the start
  3. Discontinue the drug after one week if seizures stop
  4. Measure serum phenobarbital levels and liver enzymes periodically Correct answer.

Explanation

Phenobarbital has a narrow therapeutic index and induces hepatic enzymes, so serum drug levels and liver enzymes should be monitored periodically. This guides dose adjustment and detects hepatotoxicity.

Question 22Pharmacy and Pharmacology

Which drug is a reversible acetylcholinesterase inhibitor used to treat myasthenia gravis in dogs?

  1. Neostigmine only for organophosphate poisoning
  2. Atropine
  3. Pralidoxime
  4. Pyridostigmine Correct answer.

Explanation

Pyridostigmine reversibly inhibits acetylcholinesterase, increasing acetylcholine at the neuromuscular junction to improve muscle strength in myasthenia gravis. It is preferred for maintenance because of its longer duration and milder side effects.

Question 23Pharmacy and Pharmacology

A technician must administer a drug that is a known vesicant extravascularly. What is the primary concern?

  1. Rapid systemic absorption causing sedation
  2. Loss of drug potency in the syringe
  3. Severe tissue necrosis at the injection site Correct answer.
  4. Immediate anaphylaxis in all patients

Explanation

Vesicant drugs cause severe tissue damage and necrosis if they leak outside the vein, so IV catheters must be confirmed patent before administration. Signs of extravasation require immediate cessation and supportive treatment.

Question 24Pharmacy and Pharmacology

Which statement about the use of insulin in a diabetic cat is most accurate?

  1. Insulin should be given only when the cat is hyperglycemic on a meter
  2. Insulin type and dose should be individualized and monitored with glucose curves Correct answer.
  3. All cats respond identically to the same insulin dose
  4. Insulin can be stored in the freezer for long-term use

Explanation

Insulin therapy must be tailored to the individual cat, and glucose curves or continuous monitoring guide dose adjustments. Storage and handling also affect potency and should follow the manufacturer's instructions.

Question 25Pharmacy and Pharmacology

A patient is receiving furosemide. Which electrolyte abnormality should the technician anticipate?

  1. Hypokalemia Correct answer.
  2. Hyperphosphatemia
  3. Hypercalcemia
  4. Hyponatremia only

Explanation

Loop diuretics such as furosemide increase renal potassium excretion, so hypokalemia is a common adverse effect. Serum electrolytes and renal values should be monitored during therapy.

Question 26Pharmacy and Pharmacology

A veterinary technician is asked to explain to a client why a drug's route of administration changes its onset of action. Which statement is most accurate?

  1. Subcutaneous administration always produces a faster onset than intravenous administration
  2. Intravenous administration generally produces the fastest onset because it bypasses absorption Correct answer.
  3. Oral administration produces the fastest onset because the drug enters the stomach directly
  4. Topical administration produces systemic effects faster than any injectable route

Explanation

The intravenous route places drug directly into the systemic circulation, so absorption is bypassed and the effect begins almost immediately. Oral drugs must undergo disintegration, dissolution, and absorption, which delays onset. Subcutaneous and topical routes depend on absorption and are slower than intravenous delivery.

Question 27Pharmacy and Pharmacology

A technician is preparing to administer a drug by the intramuscular route to a small, thin dog. Which technique best reduces the risk of inadvertent injury?

  1. Inject rapidly into the caudal thigh near the sciatic nerve
  2. Use the longest needle available to guarantee deep penetration
  3. Always use the same site for every injection to standardize technique
  4. Select a site such as the epaxial or quadriceps muscle with adequate muscle mass and use an appropriately sized needle Correct answer.

Explanation

Choosing a muscle with sufficient mass and a needle sized to the patient reduces the chance of striking bone, nerve, or vessel. The epaxial and quadriceps muscles are common sites in dogs. Rapid injection near the sciatic nerve or repeated use of one site increases the risk of injury and irritation.

Question 28Pharmacy and Pharmacology

Which term describes the proportion of an administered drug dose that reaches the systemic circulation unchanged?

  1. Therapeutic index
  2. Volume of distribution
  3. Clearance
  4. Bioavailability Correct answer.

Explanation

Bioavailability describes the fraction of a dose that enters the systemic circulation in an active form. Intravenous administration is defined as fully bioavailable, while oral drugs may be reduced by incomplete absorption or first-pass metabolism. Volume of distribution, clearance, and therapeutic index describe different pharmacokinetic or safety concepts.

Question 29Pharmacy and Pharmacology

A technician is reviewing a drug whose label states it is highly protein bound. What is the most clinically relevant implication of this property?

  1. Protein binding prevents the drug from distributing to any tissue
  2. The drug will be eliminated unchanged in the urine without metabolism
  3. Highly protein-bound drugs never require dose adjustment in patients with low albumin
  4. Displacement by another highly protein-bound drug can increase the free, active fraction Correct answer.

Explanation

Only the unbound fraction of a drug is pharmacologically active and able to distribute. When two highly protein-bound drugs compete for binding sites, the free fraction of one may rise and produce toxicity. Patients with hypoalbuminemia also have more free drug and may need dose adjustment.

Question 30Pharmacy and Pharmacology

A technician is asked to calculate a dose for a 12 kg dog. The order is 5 mg/kg and the vial contains 50 mg/mL. What volume should be drawn up?

  1. 2.4 mL
  2. 6 mL
  3. 1.2 mL Correct answer.
  4. 0.6 mL

Explanation

First multiply body weight by the dose: 12 kg × 5 mg/kg = 60 mg. Then divide by the concentration: 60 mg ÷ 50 mg/mL = 1.2 mL. Checking the units confirms the answer is expressed in milliliters.

Question 31Pharmacy and Pharmacology

A feline patient requires a drug that is metabolized primarily by glucuronidation in many species. Why must the technician anticipate altered dosing in cats?

  1. Cats lack hepatic enzymes entirely and cannot metabolize any drug
  2. Cats have enhanced glucuronidation and require higher doses
  3. Cats have reduced glucuronidation capacity and may require lower or less frequent doses Correct answer.
  4. Cats metabolize all drugs faster than dogs because of a higher metabolic rate

Explanation

Cats are relatively deficient in glucuronidation compared with many other species, so drugs relying on this pathway can accumulate and cause toxicity. The technician should anticipate reduced doses or longer intervals as prescribed. This species difference underlies several feline drug cautions.

Question 32Pharmacy and Pharmacology

Which term describes an unexpected, harmful response that occurs at a normal therapeutic dose of a drug?

  1. Anaphylaxis
  2. Adverse drug reaction Correct answer.
  3. Idiosyncratic reaction
  4. Drug tolerance

Explanation

An adverse drug reaction is any harmful or unintended response to a drug given at a normal dose. Anaphylaxis is a specific severe hypersensitivity event, and an idiosyncratic reaction is a genetically based unusual response. Tolerance refers to a reduced response after repeated dosing.

Question 33Pharmacy and Pharmacology

A client asks why a drug is prescribed on an empty stomach. Which explanation is most accurate?

  1. Empty-stomach dosing eliminates the need to monitor for adverse effects
  2. Fasting prevents first-pass metabolism entirely
  3. Food can alter the rate or extent of absorption, so the prescriber wants consistent drug exposure Correct answer.
  4. Food always destroys the drug molecule in the stomach

Explanation

Food can change gastric emptying, drug dissolution, and absorption, which affects plasma concentrations. Dosing consistently on an empty stomach is intended to make absorption more predictable. Food does not generally destroy drug molecules, and fasting does not eliminate first-pass metabolism.

Question 34Pharmacy and Pharmacology

A technician is asked to prepare a drug for a patient with a known sulfonamide allergy. Which action is most appropriate?

  1. Dispense the sulfonamide and document the allergy in the record
  2. Assume the allergy is irrelevant because the drug is topical
  3. Substitute a different sulfonamide because cross-reactivity does not occur
  4. Verify the allergy with the veterinarian before dispensing any sulfonamide-containing product Correct answer.

Explanation

A documented allergy should prompt verification with the veterinarian before any related drug is dispensed. Sulfonamide hypersensitivity can be serious, and cross-reactivity among sulfonamide drugs is a recognized concern. Substituting another sulfonamide or ignoring the allergy is unsafe.

Question 35Pharmacy and Pharmacology

Which of the following best describes the purpose of a loading dose?

  1. To replace maintenance dosing entirely
  2. To rapidly achieve therapeutic plasma concentrations before maintenance dosing sustains them Correct answer.
  3. To reduce the frequency of adverse effects by starting low
  4. To slowly increase drug levels over several weeks

Explanation

A loading dose is given to reach therapeutic concentrations quickly when the maintenance dose would take too long to achieve them. Maintenance dosing then keeps concentrations in the therapeutic range. A loading dose does not replace maintenance therapy.

Question 36Pharmacy and Pharmacology

A technician is monitoring a patient receiving a drug with a narrow therapeutic index. What is the most important implication?

  1. Small changes in plasma concentration can cause toxicity or loss of efficacy Correct answer.
  2. The drug is always safe because the index is narrow
  3. The drug can be dosed without measuring blood levels
  4. The drug has no dose ceiling

Explanation

A narrow therapeutic index means the toxic concentration is close to the therapeutic concentration. Small changes in dose or absorption can move the patient into toxicity or below efficacy. Monitoring drug levels is often necessary for these drugs.

Question 37Pharmacy and Pharmacology

Which drug class is used to reduce gastric acid secretion by blocking histamine H2 receptors in the stomach?

  1. Antacids
  2. Prokinetics
  3. Proton pump inhibitors
  4. H2-receptor antagonists Correct answer.

Explanation

H2-receptor antagonists such as famotidine block histamine H2 receptors on gastric parietal cells and reduce acid secretion. Proton pump inhibitors act on the proton pump, prokinetics enhance motility, and antacids neutralize existing acid. Each class works by a distinct mechanism.

Question 38Pharmacy and Pharmacology

A technician is asked to administer a drug that is a known emetogenic chemotherapeutic agent. Which supportive medication is most appropriate to premedicate the patient?

  1. An anticoagulant such as heparin
  2. An antiemetic such as maropitant Correct answer.
  3. A diuretic such as furosemide
  4. A bronchodilator such as terbutaline

Explanation

Antiemetics such as maropitant are used to prevent or reduce chemotherapy-induced vomiting. Premedication with an antiemetic improves patient comfort and reduces complications. Diuretics, bronchodilators, and anticoagulants do not address emesis.

Question 39Pharmacy and Pharmacology

Which statement about transdermal drug delivery in veterinary patients is most accurate?

  1. Absorption is consistent among all patients and species
  2. Transdermal delivery provides immediate peak concentrations
  3. Transdermal drugs never require gloves during application
  4. Absorption can be variable and is affected by skin condition, site, and species Correct answer.

Explanation

Transdermal absorption varies with skin thickness, blood flow, application site, and species differences. Hormonal and other transdermal products in animals may produce unpredictable concentrations. Technicians should wear gloves when applying these products to limit human exposure.

Question 40Pharmacy and Pharmacology

A dog is receiving a drug that is a weak acid. In which environment would the drug most likely be absorbed in its nonionized form?

  1. An acidic environment such as the stomach Correct answer.
  2. A strongly alkaline environment such as the small intestine
  3. Ionized drugs are always absorbed more readily
  4. A neutral environment only

Explanation

Weak acids exist largely in the nonionized, lipid-soluble form in acidic environments, which favors absorption across membranes. In alkaline environments, weak acids become ionized and less able to cross lipid membranes. The ionized form is generally poorly absorbed.

Question 41Pharmacy and Pharmacology

A technician is asked to explain why a drug is given with food to a patient with a history of gastrointestinal upset. Which statement is most accurate?

  1. Food always increases the drug's antibacterial spectrum
  2. Food may reduce gastric irritation and slow absorption, improving tolerance Correct answer.
  3. Food guarantees complete absorption of every drug
  4. Food eliminates the need to monitor for vomiting

Explanation

Food can buffer the stomach and slow gastric emptying, which may reduce irritation and improve tolerance for some drugs. It does not change the spectrum of activity or guarantee complete absorption. Monitoring for gastrointestinal signs is still appropriate.

Question 42Pharmacy and Pharmacology

Which of the following best describes the term 'first-pass effect'?

  1. The first dose of a drug given to a patient
  2. Metabolism of an oral drug by the liver before it reaches the systemic circulation Correct answer.
  3. The first adverse effect observed after dosing
  4. The initial distribution of a drug into adipose tissue

Explanation

After oral absorption, drug travels through the portal vein to the liver, where a portion may be metabolized before entering the systemic circulation. This reduces bioavailability and is called the first-pass effect. It is not related to the first dose or first adverse effect.

Question 43Pharmacy and Pharmacology

A technician is asked to evaluate a drug that is a potent inhibitor of cytochrome P450 enzymes. What is the most likely clinical consequence?

  1. Increased metabolism of co-administered drugs and reduced effect
  2. Enhanced renal excretion of all co-administered drugs
  3. No effect on other drugs because P450 is specific to one drug
  4. Reduced metabolism of co-administered drugs and increased risk of toxicity Correct answer.

Explanation

Inhibiting cytochrome P450 slows the metabolism of drugs that use the same enzymes, raising their plasma concentrations and toxicity risk. Enzyme inducers have the opposite effect and lower concentrations of co-administered drugs. This interaction is a common reason to adjust doses or avoid combinations.

Question 44Pharmacy and Pharmacology

Which statement best describes the role of the technician when a client reports a possible adverse drug reaction at home?

  1. Tell the client the reaction is unrelated without consulting the veterinarian
  2. Advise the client to double the next dose to compensate
  3. Document the signs, advise the client to stop the drug only as directed by the veterinarian, and relay the information promptly Correct answer.
  4. Dispose of the remaining medication without documentation

Explanation

The technician should gather details, document the signs, and promptly inform the veterinarian, who decides whether to stop or change therapy. Advising dose changes independently is outside the technician's role. Accurate documentation supports patient safety and reporting.

Question 45Pharmacy and Pharmacology

Which of the following is the most appropriate action when a technician notices that a compounded oral suspension has changed color and contains visible particles?

  1. Discard it according to policy and prepare a fresh batch Correct answer.
  2. Add water to dissolve the particles and dispense
  3. Store it for later use after filtering
  4. Shake vigorously and dispense it as prepared

Explanation

Visible particles and color change suggest instability, contamination, or improper compounding, so the product should be discarded per policy and remade. Dispensing an altered preparation risks patient harm. Compounded products should be inspected before use and stored per the beyond-use date.

Question 46Pharmacy and Pharmacology

A technician is asked to calculate a constant rate infusion for a 10 kg dog at 2 mL/kg/hr. What is the hourly rate?

  1. 5 mL/hr
  2. 40 mL/hr
  3. 10 mL/hr
  4. 20 mL/hr Correct answer.

Explanation

Multiply the rate by body weight: 2 mL/kg/hr × 10 kg = 20 mL/hr. Unit cancellation leaves milliliters per hour. Checking the arithmetic confirms the pump should be set to 20 mL/hr.

Question 47Pharmacy and Pharmacology

Which of the following best explains why a veterinarian may prescribe a drug off-label?

  1. Off-label use requires no client communication
  2. Off-label use means the drug has no known adverse effects
  3. The drug has no approved veterinary formulation but has evidence supporting its use in the species Correct answer.
  4. Off-label use is prohibited in all veterinary species

Explanation

Off-label use occurs when a veterinarian prescribes an approved drug for a species, indication, or dose not on the label based on clinical evidence and judgment. It is legal under veterinary supervision and requires informed client communication. Off-label status does not imply a lack of adverse effects.

Question 48Pharmacy and Pharmacology

A technician is preparing to give a drug that must be protected from light. Which action is most appropriate?

  1. Expose the syringe to bright light to verify the drug's color
  2. Use an amber cover or foil wrap on the syringe and minimize light exposure Correct answer.
  3. Freeze the drug to prevent light degradation
  4. Store the drug on a sunny windowsill for easy access

Explanation

Light-sensitive drugs degrade when exposed to light, so amber syringes, foil wrapping, and minimal exposure help preserve potency. Direct light or improper storage accelerates degradation. Freezing is not a general solution and may damage the drug.

Question 49Pharmacy and Pharmacology

Which statement about the use of a syringe pump for a controlled drug infusion is most accurate?

  1. Controlled drugs do not require documentation when given by infusion
  2. The drug must be secured, documented, and monitored per controlled-substance policy throughout the infusion Correct answer.
  3. The drug can be left unattended because the pump controls the rate
  4. The pump eliminates the need to monitor the patient

Explanation

Controlled substances must be secured, documented, and accounted for even when administered by infusion pump. Pumps control the rate but do not replace patient monitoring. Diversion prevention requires ongoing accountability.

Question 50Pharmacy and Pharmacology

A technician is reviewing a drug whose effect decreases with repeated administration over weeks. Which term best describes this phenomenon?

  1. Antagonism
  2. Synergism
  3. Potentiation
  4. Tolerance Correct answer.

Explanation

Tolerance is a reduced response to a drug after repeated dosing, often requiring higher doses to achieve the same effect. Potentiation and synergism describe enhanced drug effects, and antagonism describes opposing effects. Tolerance is common with chronic therapy such as anticonvulsants.