PEBC Drug Dispensing and Compounding Flashcards
7 cards from real PEBC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 PEBC Drug Dispensing and Compounding flashcards as text
A prescription calls for a 2% lidocaine solution. You have 4% lidocaine stock solution. How much 4% solution and sterile water are needed to prepare 200 mL of the 2% solution?
Answer: 100 mL of 4% + 100 mL water
Using C1V1 = C2V2: 4% × V1 = 2% × 200 mL, so V1 = 100 mL of 4% solution; the remainder (100 mL) is sterile water.
When compounding a topical ointment containing a drug that is classified as a hazardous substance, which primary engineering control is most appropriate?
Answer: Containment primary engineering control (C-PEC)
A containment primary engineering control (C-PEC) is required for hazardous drug compounding to protect the compounder and environment from exposure.
A pharmacist receives a prescription for metformin 500 mg tablets with the sig 'i tab po BID ac'. What does 'ac' indicate?
Answer: Before meals
'ac' is the Latin abbreviation for 'ante cibum,' meaning before meals.
During a compounding quality check, you discover that the beyond-use date (BUD) on a batch of sterile preparations was assigned based on manufacturer data rather than USP guidelines. What is the most appropriate action?
Answer: Quarantine the batch and reassign BUD per USP
USP guidelines govern BUDs for sterile preparations; the batch must be quarantined and the BUD reassigned according to these standards before dispensing.
A prescription is written for 'Tylenol #3'. Which controlled substance schedule does this combination product fall under in Canada?
Answer: Schedule III
Tylenol #3 contains codeine 30 mg and falls under Schedule III (narcotic) in Canada due to its codeine content exceeding exempted thresholds.
A pharmacist is preparing a batch of suppositories using cocoa butter as the base. Which mold displacement factor consideration is critical for accurate dosing?
Answer: The density factor of the API must be used to adjust base quantity
The density (displacement) factor of the active ingredient relative to cocoa butter must be used to calculate how much base to subtract so each suppository contains the correct drug dose.
A patient's warfarin dose is written as 'warfarin sodium 5 mg po od.' The dispenser notices the tablet on hand is 2.5 mg. What is the correct course of action?
Answer: Dispense two 2.5 mg tablets and counsel the patient
Two 2.5 mg tablets equal the prescribed 5 mg dose; the pharmacist should dispense two tablets and counsel the patient on proper administration.