Pharmacy and Pharmacology for the Veterinary Technician
Core Concepts
A credentialed veterinary technician must understand drug classes, mechanisms of action, pharmacokinetics (absorption, distribution, metabolism, excretion), and the practical handling of medications. Know the difference between agonist, antagonist, and partial agonist; between bactericidal and bacteriostatic antibiotics; and between narrow- and broad-spectrum agents. Familiarity with common drug families-NSAIDs, opioids, corticosteroids, antimicrobials, anthelmintics, anesthetics, and emergency drugs-is expected.
Calculations and Units
Dose calculations are a frequent testing point. Master unit conversions (mg to mcg, kg to lb, mL to cc), the formula Dose × Weight = Total amount, and drip-rate calculations (mL/hr and drops/min using the drip set factor). Always confirm whether a question asks for the per-dose amount or the daily total.
Storage, Safety, and Law
Understand controlled-substance handling, log requirements, expiration dates, and species-specific hazards (e.g., permethrin toxicity in cats, NSAID caution in renal patients). The technician should know withdrawal times for food animals and the importance of the veterinary-client-patient relationship for prescribing.
Traps to Watch
Questions often swap concentration units or ask for a volume when the calculation yields a mass. Read for the requested unit. Watch for look-alike/sound-alike drug names and for species contraindications.
Worked Example
A 10 kg dog needs 5 mg/kg of a drug supplied at 50 mg/mL. Total dose = 5 × 10 = 50 mg; volume = 50 mg ÷ 50 mg/mL = 1 mL. If asked for a daily total given twice daily, multiply by 2.
Rule of Thumb
Always write units at every step and cancel them; if the final unit is not what the question asks, you have made an error.