The European Commission closed its consultation on a revised Chapter 1 of the EU-GMP guidelines on 3 December 2025, and one of the clauses it rewrites is the product quality review. If you're a Canadian Licensed Producer supplying the EU medical channel, your importer's Qualified Person can ask to see that review at the next audit.
A cannabis product quality review (PQR) is an annual, documented review of every batch of a cultivar produced for EU supply. It checks whether your process stayed consistent, whether your specifications still fit, and which trends need action. The requirement sits in Chapter 1, section 1.10 of EudraLex Volume 4, and ICH Q7 section 2.5 sets the same expectation for active substances. Health Canada has no equivalent in the Good Production Practices provisions of the Cannabis Regulations. A site that has only worked to GPP will be writing its first PQR from scratch.
What a cannabis product quality review must cover
Section 1.10 lists 12 review items. The text was written for tablets and injectables, so the wording won't match a flower room. Here's how each item translates to a cannabis operation, and where the data usually lives.
| EU-GMP 1.10 item | What it means for flower | Typical data source |
|---|---|---|
| Starting and packaging materials | Clones, growing media, nutrients, bags and liners | Supplier files, receiving logs |
| In-process controls and finished results | Potency, moisture, microbials, pesticides, heavy metals | COAs from your ISO/IEC 17025 lab |
| Out-of-specification batches | Every failed batch and its investigation | OOS reports |
| Significant deviations and CAPA | Room excursions, pest events, trim errors | Deviation log, CAPA records |
| Process and method changes | New drying protocol, new lab method | Change control records |
| Marketing authorisation variations | Dossier changes in each import market | Importer regulatory file |
| Stability programme results | Potency and water activity across shelf life | Stability protocol data |
| Returns, complaints and recalls | Importer complaints, rejected lots | Complaint log, recall file |
| Previous corrective actions | Did last year's fixes work? | CAPA effectiveness checks |
| Post-authorisation commitments | Open commitments to an EU authority | Regulatory correspondence |
| Equipment and utility qualification | HVAC, dehumidifiers, water, compressed air | Qualification reports |
| Contractual arrangements | Quality agreements, contract labs, logistics | Signed agreements |
Two items trip up cultivators more than the rest. The equipment item pulls HVAC and dehumidification qualification into a product document, so a drying room that was never formally qualified shows up as a PQR gap. The contracts item means your quality agreement with the EU importer has to be current on the day you sign the review.
Build the data trail first, and the table fills itself in.
Where Canadian LPs get stuck: grouping and low batch counts
Most PQR guidance assumes a plant making the same product hundreds of times a year. An indoor cannabis facility doesn't work that way. You might harvest one cultivar a handful of times in 12 months, ship a second one twice, and retire a third in the spring.
That creates two problems. Trend analysis on three or four batches is thin, and a QP will say so. Grouping cultivars into one review looks efficient, but Chapter 1 only allows grouping where it's scientifically justified. Two cultivars grown in the same rooms, fed the same nutrient program, and dried under the same protocol may be groupable. A high-terpene cultivar with a different harvest window probably isn't.
This is the exact gap the draft revision targets. The Commission says the revised text clarifies how PQRs handle product grouping and review periods with only a limited number of batches. The current Chapter 1 has been in operation since 31 January 2013, which makes this the first rewrite of the PQR clause in over twelve years. Write your grouping rationale now, while the final wording is pending, and you won't have to rebuild it later.
The data assembly problem
The second place LPs stall is pulling one batch's history together. For a single lot, the evidence usually sits in four places:
- Cannabinoid, microbial and contaminant results on third-party COAs
- Inventory movements in the Cannabis Tracking and Licensing System
- Room temperature and humidity in environmental monitoring software
- Deviations and complaints in a QMS or, too often, a spreadsheet
If those records can't be reconciled to the same batch number, the PQR can't be written. Close the data integrity gap first, and the PQR becomes a reporting task.
If your QA team can't produce a signed PQR within two weeks of an importer asking for one, you aren't ready to supply the EU medical channel.
The 5-step cannabis PQR build
The five steps below are the order we'd recommend to any LP writing its first review. Each one produces an output the next step depends on.
Step 1: Set the scope and write the grouping rationale
Define the review period, usually 12 months, and list every batch released, rejected or returned for EU supply in that window. Then decide which cultivars get their own review and which are grouped. Write down why. An auditor will ask for that justification before reading a single chart.
Step 2: Pull every record by batch number
Collect COAs, tracking records, deviation reports, complaints, stability pulls and retention sample logs for each batch in scope. Reconcile quantities and dates across systems. Any batch that can't be traced end to end becomes a finding in its own right.
Step 3: Trend what the QP actually checks
Plot total THC against label claim, water activity and moisture, total aerobic microbial counts, and yeast and mould counts, batch by batch. Look for drift across passing batches as well as outright failures. A cultivar whose water activity climbs across four passing batches is telling you something about your drying room, and your stability programme should confirm or rule it out.
Step 4: Test last year's CAPAs and this year's changes
List every change made to the process, equipment or test methods during the period. For each CAPA opened the year before, record whether it closed and whether the problem came back. Your deviation and CAPA system should hand you this data without a rebuild.
Step 5: Conclude, sign and share
Every section needs a written conclusion and, where warranted, a named action with an owner and a due date. QA signs the review, and a copy goes to the importer's QA team and the QP responsible for batch certification. A PQR that ends without actions is a filing exercise. Auditors notice.
How EU importers and QPs use your PQR
Your PQR has three readers outside your building. The importer's QA team uses it to requalify you as a supplier. The QP uses it as context when certifying batches from your site. The inspecting authority reads it to judge whether your quality system learns from its own data.
That's why the conclusions matter more than the page count. A 60-page PQR with no trend statements tells an inspector you collected data and stopped. A 15-page review that names two adverse trends and the CAPAs opened against them tells them your system works. Expect importers to request the PQR alongside your site master file before an on-site audit.
AlphaLeaf is a Health Canada Licensed Producer in Montreal, growing indoor, hand-trimmed flower from refined genetics. Every batch carries ISO-certified test data and full traceability, and we hold export authorisation under the Cannabis Act for supply into EU medical channels.
If you're qualifying a Canadian supplier for 2027 and want to see how we document batch quality, contact our team or review our certifications. Ask for the data. Then read the conclusions.
Frequently Asked Questions
What is a product quality review in cannabis manufacturing?
A product quality review is an annual, documented review of all batches of a cannabis product made for EU supply. It verifies process consistency, confirms that specifications still fit, and identifies trends that need corrective action. EU-GMP Chapter 1, section 1.10 sets the requirement.
Does Health Canada require an annual product quality review?
No. The Good Production Practices provisions of the Cannabis Regulations don't include an annual product quality review. Canadian LPs supplying EU-GMP markets write one because EU importers, QPs and inspectors expect it.
How often should a cannabis PQR be completed?
Annually is the norm. EU-GMP allows periodic or rolling reviews, and each review should take the previous one into account. A rolling approach spreads the workload by reviewing cultivars at different points in the year.
Can multiple cannabis cultivars be grouped in one PQR?
Yes, where grouping is scientifically justified. Cultivars grown, dried and packaged under the same process may be grouped, but the rationale must be documented. The draft revision of EU-GMP Chapter 1 clarifies expectations for product grouping.
What if a cultivar had only two batches in the review period?
You still complete the review. Report the batches, state that trend analysis has limited statistical value, and carry the data into the next period. The draft revision of Chapter 1 addresses limited-batch review periods directly.
Who is responsible for a cannabis PQR?
The manufacturer's quality function prepares and approves it. Where the manufacturer isn't the marketing authorisation holder, a technical agreement should define each party's responsibilities. The QP responsible for batch certification then works with the authorisation holder to make sure the review is timely and accurate.
