PTCB patient safety and quality assurance practice test

Patient Safety and Quality Assurance is 23.75% of the 2026 PTCE, about 19 of the 80 scored questions: high-alert and look-alike, sound-alike drugs, tall man lettering, error-prone abbreviations, error prevention strategies, event reporting, hygiene and cleaning, and when a question must go to the pharmacist. The free drill below is 12 original questions.

23.75%
of the 2026 PTCE: 21
questions in our mock: 8
abbreviations to never use: 12
questions in the free drill

Last checked 22 October 2026 · Domain weight from ptcb.org; abbreviations and tall man letters from ISMP

Free patient safety drill: 12 original PTCB-style questions at the real exam's pace, then every answer explained. No sign-up.

12
questions
14:40
time limit
Free
every answer explained

By the LifeScore Editorial Team · Updated 22 October 2026 · How we check facts · How this is scored

What patient safety topics are on the PTCB exam?

How errors happen and how a pharmacy stops them: high-alert medications, look-alike and sound-alike names, tall man lettering, error-prone abbreviations, bar code scanning and other checks, reporting errors and adverse events, hygiene and cleaning, and the questions a technician must refer.

The topics and what the questions ask
Topic	What the questions ask
High-alert medications	Which drugs cause serious harm when an error happens, and the extra safeguards for them
Look-alike, sound-alike drugs	Name pairs that get confused, and how tall man letters and separate storage help
Error-prone abbreviations	Which abbreviations and dose designations ISMP says not to use, and what to write instead
Error prevention	Bar code scanning, two identifiers, the pharmacist check, separating stock, clear labels
Event reporting	Near misses, medication errors and adverse drug events, MedWatch and VAERS
Hygiene and cleaning	Handwashing, cleaning counting trays, separating penicillin and sulfa equipment, spills
Technician scope	Questions only the pharmacist may answer: clinical advice, counseling, OTC recommendations

Which abbreviations should never be used in a pharmacy?

The ones ISMP lists because they cause real errors: U and IU for units, qd and qod, trailing zeros, missing leading zeros, MS and MgSO4, and µg. Write the word or the number in full.

Error-prone abbreviations and what to write instead (ISMP)
Do not use	Why	Write instead
U or u (units)	Read as 0 or 4, so 10U becomes 100	Write "units"
IU (international units)	Read as IV or 10	Write "units"
qd or QD (daily)	Read as qid (four times a day)	Write "daily"
qod (every other day)	Read as qd or qid	Write "every other day"
Trailing zero (5.0 mg)	The point is missed and 5.0 is read as 50	Write 5 mg
No leading zero (.5 mg)	The point is missed and .5 is read as 5	Write 0.5 mg
MS, MSO4, MgSO4	Morphine and magnesium sulfate confused	Write the full drug name
µg (micrograms)	Read as mg, a thousandfold error	Write "mcg"

The test of every abbreviation question is the same: how could this be misread, and by how much would the dose change? A tenfold error from a missing leading zero is worse than a confusion between two directions, and the exam rewards the option that removes the ambiguity entirely.

PTCB-style question 1 · Error-prone abbreviations
An order reads "regular insulin 6U before meals." What is the main danger of writing it this way?
1. A"U" can be read as a 0, so 6 units becomes 60
2. B"U" is a brand abbreviation, so the wrong product is chosen
3. CUnits are not a legal measure for insulin
4. DThe order will be read as 6 mL
Worked answer
A: "U" can be read as a 0, so 6 units becomes 60. ISMP lists "U" for units as error-prone because a handwritten U can look like a 0 or a 4, turning 6U into 60 or 64. The safe way is to write "units" in full: "6 units".
1. Ask how the abbreviation could be misread.
2. A U next to a number looks like a zero.
3. So the dose can be read ten times too high; write "units".
The trap: Thinking the issue is the unit itself. Insulin is dosed in units; the problem is the abbreviation.

Four patient safety drills

Eight full 90-question mocks and 16 drills, every answer explained with the ISMP or FDA rule behind it.

The PTCB Pass Pack gives you 8 full mocks on the real clock, 16 drills of 12 questions for the sections that cost you points, and a predictor that turns your mocks into the odds of reaching your target. One payment, no subscription, and your free score stays free.

Prep courses for these tests usually cost $19 to $129. The PTCB Pass Pack is US$39 (£29), once.

See the PTCB Pass Pack How our questions are built and checked

8
timed mocks: 16
topic drills: 1
score predictor

What is tall man lettering?

Capital letters used in the part of a drug name that differs from a look-alike, such as hydrOXYzine and hydrALAZINE, so the eye catches the difference. FDA and ISMP publish the pairs.

Common look-alike pairs with tall man letters
Drug	Often confused with
hydrOXYzine (antihistamine)	hydrALAZINE (blood pressure)
glipiZIDE	glyBURIDE (both sulfonylureas)
busPIRone (anxiety)	buPROPion (depression, smoking)
predniSONE	prednisoLONE
traMADol (pain)	traZODone (sleep, depression)
clonazePAM (seizures, panic)	cloNIDine (blood pressure, ADHD)
ALPRAZolam	LORazepam
NIFEdipine	niCARdipine

Tall man letters help, but the barrier that catches a wrong bottle is scanning it against the prescription. Pharmacies also store look-alike pairs apart and add shelf alerts. On the exam, the best answer to "how do we prevent this" is usually the step that checks the product itself.

PTCB-style question 1 · Error prevention
A technician pulls clonazepam for a prescription written for clonidine. Which step in the filling process is designed to catch this before the pharmacist check?
1. AScanning the stock bottle bar code against the prescription
2. BCounting the tablets twice
3. CChecking the stock bottle's expiration date
4. DConfirming the patient's date of birth at pickup
Worked answer
A: Scanning the stock bottle bar code against the prescription. Scanning the stock bottle matches its NDC to the drug on the prescription, so a look-alike name pulled by mistake is flagged at once. Counting, expiration checks and patient identifiers do not compare the drug itself.
1. The error is the wrong drug, a look-alike name.
2. Only one step compares the drug in hand with the drug ordered: the bar code scan.
3. The pharmacist's final check is a second barrier, not the first.
The trap: Choosing the date-of-birth check. It confirms the right patient, not the right drug.

What are high-alert medications?

Drugs that cause serious harm when an error happens, even if errors are no more common: insulin, anticoagulants such as warfarin, opioids, oral methotrexate for non-cancer use, chemotherapy, and concentrated potassium and electrolytes in hospitals.

Safeguards for high-alert drugs include standard concentrations, independent double checks, clear auxiliary labels (for example "weekly" on methotrexate), limits on stock and counseling every time. Insulin questions often turn on concentration: U-100 is 100 units per mL, U-500 is 500 units per mL, and a mix-up is a fivefold error.

The exam also asks about the error chain: a near miss is caught before it reaches the patient; a medication error reaches the patient; an adverse drug event is harm, whether from an error or from a correctly used drug. Report errors through the pharmacy's system and, for serious events, to the FDA's MedWatch; vaccine events go to VAERS, run by the CDC and FDA.

PTCB-style question 1 · High-alert drugs
Which of these is on ISMP's list of high-alert medications for community and ambulatory settings?
1. AAmoxicillin
2. BLoratadine
3. COral methotrexate for non-cancer use
4. DOmeprazole
Worked answer
C: Oral methotrexate for non-cancer use. Oral methotrexate taken weekly for conditions such as rheumatoid arthritis is a high-alert medication: taking it daily instead of weekly has caused deaths. Pharmacies add safeguards such as clear weekly labeling and counseling.
1. High-alert means a mistake causes serious harm, not that mistakes are common.
2. Weekly methotrexate taken daily is a known fatal error.
3. The other three are low-risk at usual doses.
The trap: Picking a drug because it is common. High-alert is about the harm an error causes.

What should a pharmacy technician refer to the pharmacist?

Anything that needs clinical judgement: drug interactions, allergies, side effects, dose questions, OTC recommendations, counseling, and any doubt about whether a prescription is right or legitimate.

Many PTCB questions are written as small scenes: a patient asks if a new rash is from her antibiotic, a caregiver asks whether two products can be taken together, a customer wants a cold medicine and takes a blood pressure drug. The technician's job in each is to gather the facts and get the pharmacist, not to answer.

Practise the whole domain in the free drill above, then take the full PTCB practice test. The drug side of these questions is on the PTCB medications practice test, and more worked questions are on PTCB sample questions.

Frequently asked questions

What does ISMP stand for?

The Institute for Safe Medication Practices, a nonprofit that publishes the error-prone abbreviation list, the high-alert medication lists and the tall man letters list.

What is a near miss?

An error caught before it reaches the patient. Pharmacies report near misses too, because they show where the process can fail.

Why are penicillin products counted on a separate tray?

To keep penicillin residue away from other drugs, because of the risk of a severe allergic reaction in sensitive patients.

Is "qd" allowed on prescriptions?

ISMP and The Joint Commission advise against it, because it can be read as qid. Write "daily".

Are these real PTCB questions?

No. They are original PTCB-style questions written from ISMP and FDA guidance. LifeScore is not affiliated with PTCB.

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