Pharmacy and Dispensing
Pharmacy and Dispensing
This domain tests prescription writing, labeling, controlled-substance handling, storage, compounding, and legal drug use in animals.
Core rules
- A complete prescription includes patient and client identification, drug name and concentration, dose, route, frequency, duration, quantity, number of refills, and any withdrawal time for food animals.
- Controlled substances are stored double-locked, inventoried, and logged; errors are corrected with a single line and initials, never obliterated. Counts are reconciled regularly.
- Labels must match the medical record; vague directions such as "as directed" invite error.
- Storage: refrigerate insulin, most vaccines, and some antibiotics; never freeze them; protect from light where required.
- Compounding is a last resort when no approved product exists, and falls under AMDUCA; withdrawal times for food animals are obtained through FARAD.
Worked example
A 30 kg dog is prescribed 10 mg/kg q24h for 10 days of a 100 mg tablet. Dose = 300 mg, so 3 tablets per day. Total = 30 tablets; dispensing exactly 30 leaves no margin, so 32 is reasonable. The label states the exact dose, route, and duration.
Traps
- Dispensing a controlled drug without a log entry.
- Using an expired or improperly stored vaccine.
- Assuming a compounded product has the same stability as the commercial drug.
- Omitting the withdrawal time on a food-animal prescription.