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How to tell if your PTCE study material is out of date

Search your material for the word alligation. PTCB removed it, and all of compounding, from the outline that took effect on January 6, 2026, so a source still teaching either was written for a different exam. Three more checks below take about two minutes together.

Published August 23, 2026

Open whatever you are studying from and search it for one word: alligation. If it appears as something you are expected to know, that material was built for the outline PTCB retired in January 2026, whatever date is printed on the cover. We should say up front that a source failing this check is not necessarily bad at everything else; it means you cannot trust its scope, which is a different problem and a fixable one.

The four checks below are all things you can verify yourself against documents PTCB publishes free. None of them require taking our word for anything, which is deliberate, because a source's claim to be current is the exact thing you are trying to test.

Check one: alligation

PTCB's announcement of the new outline states that alligation was removed from the calculations area. Read the 2026 outline itself and it is not there. A prep source that still drills the tic-tac-toe grid is spending your time on a method the exam will not ask you to use.

This is the fastest check because alligation is a distinctive word. It appears in no other context, so a single search finds it, and its presence is unambiguous rather than a judgment call about emphasis.

Check two: compounding

Search for 797, aseptic, garbing, or beyond-use. Compounding came off the exam completely, so sterile and nonsterile procedure, USP chapters 795 and 797, cleanroom air classes, laminar airflow hoods, and beyond-use dating for compounded preparations are all outside the current scope.

Be careful with what this check tells you, because the neighboring material did not leave with it. Hazardous drug storage, handling and disposal stayed. So did personal protective equipment, cleaning standards, and drug stability for reconstituted products. A source covering those is not out of date; a source walking you through garbing order is.

Check three: the domain weights

Every domain's share of the exam moved with the new outline, which makes the weights a reliable fingerprint. If your material says Medications is 40% of the exam, or that Federal Requirements is around an eighth of it, you are reading the previous outline.

Federal Requirements is the one that should change how you study. It went from an eighth of the exam to nearly a fifth, and material written for the old weighting will under-serve it by a wide margin. We have written up what changed and what it means for your schedule in more detail, including which areas inside Federal Requirements absorbed the increase.

Check four: does it name the date

A source that was genuinely revised for the current exam tends to say so, because saying so is the selling point. Search for January 2026, or for 2026 outline. Silence is not proof of staleness, but combined with a failure on any check above it settles the question.

What this looks like in practice

We ran these checks on two of the highest-ranking free PTCE resources on 23 August 2026, because a checklist nobody has tested is just a theory. One of them, PTCB Test Prep, passes cleanly and states outright that “alligations was removed from the PTCB content outline with the January 2026 update and is no longer identified as a testable topic”.

The other, Mometrix, lists “Sig codes, formulas, proportions, alligations, conversions, ratios, and calculations” as Order Entry and Processing content, on a page whose footer reads “Last Updated: August 21, 2026”. The same page gives Order Entry as 22.25%, where PTCB's outline says 22.50%. We are not making a claim about the rest of their material, which we have not read; those two things are what the checks found.

The useful lesson is not about either company. It is that a recent update date tells you when a page was touched and not what was checked, so the date on the cover cannot do this job for you.

If your material fails

You do not necessarily need to replace it. Compounding and alligation are self-contained topics, so the practical fix is usually to skip those chapters and find current coverage for Federal Requirements, which is the domain whose weight moved most. The rest of a good older book has not stopped being true, and the drug classes in particular are as current as they were the day it was printed.

PTCB publishes the two documents that settle every question here free on ptcb.org: the PTCE Content Outline and the CPhT Knowledge Reference. Our own blueprint walkthrough goes domain by domain through the current version, and the drug reference is free to use without an account if you want to test a source's drug coverage against something.

One limit worth stating plainly: none of these checks tell you whether a source's practice questions are any good. PTCB does not publish item counts per knowledge area, so nobody outside PTCB can tell you how closely a given question set matches the real sampling, and any product claiming otherwise is guessing at something it cannot see.

Related

• What changed on the 2026 PTCE, and what you can stop studying
• Is compounding still on the PTCE?
• The 2026 PTCE blueprint, domain by domain