GMP Module 123123- Laboratory Controls.pptx

SPONSORED BY THE NATIONAL CANCER INSTITUTE
cGMP Training – Laboratory
Control
Biopharmaceutical Development
Program

It’s All About SISQP
In the GMPs at least 20 times !
2

GMP SUBPARTS
A: General Provisions
B: Organization and Personnel
C: Buildings and Facilities
D: Equipment
E: Control of Components and Drug Product Containers
and Closures
F: Production and Process Controls
G: Packaging and Labeling Control
H: Holding and Distribution
I: Laboratory Controls
J: Records and Reports
K: Returned and Salvaged Drug Products
3

Laboratory Controls
Objectives for this module
• Explore the GMP requirements for
LABORATORIES
̶ Quality Control (Process Analytics), Manufacturing,
Validation, & Other Departments
̶ Testing of raw materials, in-process & final product,
utility & EM samples, etc.
• Review some Warning Letter citations related to
Laboratory Controls
• Review application questions
4

Laboratory Controls
“Suitable”
GMPs require that processes, buildings, equipment, raw
materials, specifications, and testing be SUITABLE and
capable of ensuring SISQP of the drug product.
Are you able to prove that your systems are SUITABLE?
The proof relies on DATA, usually LABORATORY DATA.
5

Laboratory Controls
Example Manufacturing Process
This is a general process for
products that we produce here.
We start with raw materials and
develop a fermentation process
followed by a recovery process
then a purification process and
finally a fill/finish process to
produce products for Phase I &
II clinical studies.
6

When the question is asked “Does the
product meet specification?” The
answer to that question, yes or no, is
answered with Laboratory Data.
Raw Materials
Purification
Recovery
Fermentation
Fill / Finish
7

Laboratory Controls
Reliability of the Manufacturing Process
The cascade of subprocesses that string together to produce a product is a SYSTEM. And
the whole string of subprocesses is the MANUFACTURING PROCESS.
For a Phase I product, the reliability of the manufacturing process is not the primary
concern. You may only use that manufacturing process a few times – enough to get
material for clinical trials. If the process isn’t as reliable as it could be, if you have to “tweak”
the process in different ways each time you make a batch, if 2 batches fail for every 8 you
produce, . . . you can live with that – for now. And you rely on rigorous final product testing
to determine that you have an acceptable product.
But for a licensed drug product – one that FDA has approved for commercialization, one
that you or one of your loved ones might take, FDA is VERY CONCERNED with the
question “is the MANUFACTURING PROCESS RELIABLE ?”. Of course, we still care
whether the product meets specs but we also care about the reliability, the consistency of
the PROCESS. If you performed the process numerous times, do you always get a product
that meets specs? And the reliability of the manufacturing process depends on the reliability
of the subprocesses that make up the manufacturing process.
And how do you determine the reliability of subprocesses? . . . . With laboratory data!
8

Laboratory Controls
LABORATORY DATA
• Used to establish whether the product meets
specifications
• Used to establish whether the sub-processes
are reliable
“Testing lies at the heart of a drug manufacturer’s
successful operation. Through testing, companies
validate their processes and ensure the quality of batches
for release.”
(United States vs. Barr Laboratories)
9

UNRELIABLE TEST METHODS HAVE
CONSEQUENCES
Our goal is to have our laboratory test results
reflect reality. The test results should truly reflect
when a lot does or does not meet specification.

Manufacturer and Consumer Risk
When a lot truly does NOT meet specifications, but the test results
indicate that it DOES meet specifications, then that is consumer risk.
Patients could be injured.
When a lot truly DOES meet specifications, but the test results indicate
that it does NOT meet specifications, then that is manufacturer risk. The
lot is wrongly failed and good product, time, and materials are wasted.
Our goal is to create systems where truly good lots obtain test results
that are passing specification and truly bad lots obtain test results that
are out of specification. To the extent possible, we need to minimize
consumer risk AND manufacturer risk.

How well does the USP Sterility Test
detect contamination?
How contaminated is
the batch?
Probability of FAILING
the Sterility Test
1 per 1000 units 2 %
5 per 1000 units 10 %
10 per 1000 units 18 %
50 per 1000 units 63 %
100 per 1000 units 86 %
500 per 1000 units 100 %
Source “Towards an Improved Sterility Test”, Jeanne Moldenhauer and Scott VW Sutton, PDA Journal of
Pharmaceutical Science and Technology, Vol 58, No 6, Nov-Dec 2004, pg 284 12

Take-Home Message
If you are manufacturing GMP products, we need to
CONSISTENTLY manufacture them so that each vial
represents all the vials in the lot.
If you are doing testing, we need to ensure we maximize the
validity and credibility of the testing.
We already know it’s inherently imperfect, we don’t want to make it worse.
How do we know laboratory data is reliable?
The systems that are used to control the generation of laboratory data are
described in the GMP requirements for LABORATORY CONTROLS and
the systems that must be developed for the laboratory records are
discussed in the GMP section of Records and Report, specifically the
section on Laboratory records.
13

Subpart I.
GMP Sections – Laboratory Controls
• General
• Testing and Release
• Stability
• Special Testing
• Reserve Samples
• Lab Animals
• Penicillin
14

Subpart I. Laboratory Controls
Sections: General
15
• Laboratory testing occurs at many stages (raw material receipt, in-
process/release/stability testing, validation efforts)
• GMPs require written specifications, standards, sampling plans,
procedures (including changes)
− Must be scientifically sound
− Include a description of sampling and testing procedures
− Approved by QA
• Laboratory activities must be documented at the time they are
performed

• Deviations must be recorded and justified
• Determine conformance to established
specifications
• Test samples must be representative and identified
• Retest raw materials if subject to deterioration
• Calibrate equipment at suitable intervals per written
program
− Instruments not meeting specifications may not be used
− Investigation is required
16

Warning: no procedures
17
- Must be scientifically sound
- Include a description of sampling and testing
procedures
- Approved by QA
• Document activities at the time they are performed.
• Deviations must be recorded and justified.
• Determine conformance to established specs
• Test samples must be representative and ID’d
• Retest components if subject to deterioration
• Calibrate equipment at suitable intervals per written
program
- Instruments not meeting specs can’t be used.
No established procedure for the usage of
prepared standards solutions for testing
folic acid and iron .…
Earlham College
Richmond, VA

Preparation and Use of Buffers
& Standard Solutions

Warning Letter: Sampling Thief Not Used
19
The sampling thief required by the sampling
procedure was not used by the operators taking
the in-process sample or even available to
them. According to the operators, they used
a small plastic spatula to sample from the
top of the drum.
Schering-Plough,
Puerto Rico

Representative Sampling
of Raw Materials
BDP SOP 22714 Sampling, Testing, and Review of CGMP Materials by
Process AnalyticsQuality Control
• Number of containers sampled is determined by the ANSI/ASQC
Z1.4 Table Requirements for General Inspection Level II
• A sampling thief must be used for raw material containers larger than 15 kg. A sampling
thief allows you to remove samples at specified depths to ensure samples are
representative of the entire container
20

Sections: Testing & Release
• Confirm conformance to specifications using laboratory
determination
− Identity and strength of each active ingredient
− Free of objectionable microbes (if applicable)
− Prior to release
• Adequate acceptance criteria for sampling and testing
• Establish and document accuracy, sensitivity, specificity &
reproducibility of test methods.
− Limit of Detection (LOD) & Limit of Quantitation (LOQ)
• Reject for failure to meet specs, standards, etc.
− Must investigate OOS, failures, etc.
− Can reprocess
− Reprocessed product must pass specifications
21

Warning Letter: Failure to use Validated
Test Method
Failure to use a validated test method for
release testing. The assay method for
guaifenesin in Spec-Tuss TM Palatable
Expectorant Powder has not been validated
for accuracy, sensitivity, specificity,
and reproducibility.
Neogen Corporation,
Lansing, MI 22

Warning Letter: Validation Data
Unavailable
Written descriptions and validation data for
finished product testing methods were
unavailable.
Cardinal Enterprises, Inc.
Middletown, RI, 2001
23

Warning Letter: Released Products Out
of Specification
Two lots of GOJO Hand Medic III were
released that had final product
test results that were out of specification.
A complete investigation into the root cause
of the problem was not completed
before product release
GOJO Industries, Inc.
Akron, OH
24

Warning Letters: Failure to Meet
Required Specifications
Failure to reject drug products that
fail to meet established
specifications. For example,
several drug products
manufactured by your firm
containing
octyl methoxycinnamate
failed specifications and were
released.
2-2-0 Laboratories
Riverside, CA., 2001
Failure to ensure satisfactory
conformance to final specifications
prior to release. For example,
you failed to conduct
finished product testing
on at least 6 batches of product
2-2-0 Laboratories
Riverside, CA., 2001
25

Laboratory Controls
IS THERE ANYTHING ELSE . . .?
Once you have a validated
procedure, how do you know
the analyst is capable?
• Education
• Experience
• Training
• Proof of Competency
26

Laboratory Controls
How Do I Know That …
27
TEST IS PERFORMED PROPERLY?
• Written, approved procedures
• Appropriate Controls and Standards
• Analyst properly trained
• Procedures followed & documented
TEST MEASURES WHAT IT IS SUPPOSED TO MEASURE?
• Qualification & Validation
SPECIFICATION IS CORRECTLY SET?
• Based on data and scientific analysis
• Written and approved
RESULT IS ACCEPTABLE?
• Compared to specification

Analytical Method
Qualification and Validation
FDA Guidance – Analytical Procedures and Methods
Validation for Drugs & Biologics July 2015
FDA Guidance – Bioanalytical Method Validation May
2018
ICH M10 – Bioanalytical Method Validation Draft
28

Sections: Stability
• Written testing program to assess stability of the
drug product
− Drug products degrade over time
− We need to know when they are going to fall out
of specification
• Test data is used to determine an appropriate
shelf-life and expiration date
− Real time stability studies are required
− Accelerated stability studies are recommended
29

Warning Letter: Stability Data
Failure to establish stability data to support
the 2 year expiry period for Spec-Tuss TM
Expectorant powder.
Neogen Corp,
Lansing, MI
30

Warning Letter: Lack of Written Testing
Program
Failure to have a written testing program
designed to assess the stability
characteristics of drug products.
Wayzata Bay Products, Inc.,
St. Bonifacius, MN
31

Stability
32
The GMPs require a written testing program to assess
stability of drug product to include:
• Sample size and test intervals to properly evaluate each
attribute (based on statistical criteria)
• Storage conditions for samples
• Reliable, meaningful, and specific test methods
− Reliably measure SISQP
• Same container-closure system as the drug product
• Testing of reconstituted product at time of dispensing and
after reconstitution

Stability
Determination of Appropriate Shelf-life
33
• Establishment of expiration data must be based on
testing and results must be documented.
• Accelerated studies with other data may be
acceptable for tentative dating.
− Validate with real-time studies
− Statistically sound
• Full real-time shelf-life studies must be conducted
until the actual shelf-life has been determined.
− At least 3 lots and whenever a change is made to
manufacturing or storage procedures, container/closure,
etc.

Stability Guidelines
ICH Q1A(R2), Stability Testing of New Drug Substances &
Products
ICH Q1E, Evaluation of Stability Data
ICH Q5C, Stability Testing of Biotechnological & Biological
Products
34

Special Testing
35
If claimed to be sterile, or pyrogen-free, laboratory
testing must confirm
• Procedures must be in writing
• Written procedures must be followed and documented
For controlled-release dosage forms, must test for
conformance to specs for rate of release of each active
ingredient
• Procedures must be in writing
• Written procedures must be followed and documented

Retain Samples
36
• ACTIVE INGREDIENTS
− Retain a sample of each lot in each shipment
(identify properly)
− Retain quantity = 2X needed for testing to specs
(except for sterility and pyrogen testing)
− Retain period = 1 year after expiration of last lot that
used the ingredient
− For Phase 1 products, FDA recommends that
samples be retained for at least two years following
clinical trial termination or IND withdrawal

Reserve Samples Question
We received active ingredient, vendor lot XYZ, in
3 different shipments. Do we need to maintain a
reserve sample for each shipment? They are the
same lot from the manufacturer.
37

Reserve Samples Answer
YES. Each lot in each shipment must have a
reserve sample.
Reserve samples from each shipment must be
identifiable. BDP assigns a different lot number
for each lot in each shipment (the same vendor
lot received in different shipments will be
assigned different BDP lot numbers).
38

Reserve Samples
Final Drug Product Retains
39
• Store consistent with product labeling
• Store in same container/closure system (or with same materials &
characteristics)
• 2X quantity required for retesting
− (except for sterility and pyrogen testing)
• Retain for 1 year after expiration of drug product
− For Phase 1 products, FDA recommends that samples be retained
for at least two years following clinical trial termination or IND
withdrawal
• Yearly, examine a statistical sampling to detect deterioration
(waived if it would cause product damage)
− Document the examination. Maintain with data from other lots.
− Investigate any detected deterioration

Sections: Laboratory Animals
40
• Animals may be used for testing components, in-
process materials or final products. In order to
ensure quality and traceability:
• Animals must be maintained in a manner to assure
their suitability for use.
• Records should identify animals used.
• A history of the animal’s use must be maintained,
particularly for animals used more than once.

Sections: Penicillin
41
• Minute quantities of penicillin can cause life
threatening allergic reactions.
• Requirements for manufacturing operations covered in
Buildings and Facilities Module
• If there could be potential cross- contamination
with penicillin, must test for penicillin
− Cannot market the product if detectable levels are found
− Applies to all beta-lactam antibiotics

Warning Letter: Penicillin
Failure to test non-penicillin drug product
for the presence of penicillin when
a reasonable possibility exists that
non-penicillin drug products
could have been exposed to
cross-contamination with penicillin.
Pharmaceutical Distribution Systems
Montclair, VA
42

Out of Specification (OOS) Case
United States of America, Plaintiff
v.
Barr Laboratories, Inc.,
Defendants
1993

Out of Specification (OOS)
The court case United States of America versus Barr
Laboratories, tried in 1992 in New Jersey, sent FDA
regulated industries a wake-up call.
Barr was inspected numerous times from 1989 – 1992.
In 1992, FDA inspected the Northvale Facility giving
them a 483 containing 75 items and the Pomona
Facility, giving them a 483 containing 47 items. Many of
these issues had been recorded during prior visits to
Barr in the areas of process validation, failure
investigation and laboratory practices.

Discovery
FDA discovered that Barr was:
• Averaging out of specification results with in-spec results to get a passing result
• Maintaining an ineffective program for process validation
• Discarding raw data
• Conducting multiple retests with no defined end point
• Performing inadequate failure investigations
• Lacking method validation
Eventually, FDA took regulatory action against the firm, and brought a preliminary injunction
against Barr directing them to suspend, recall or revamp numerous products in the Barr
product line. Barr subsequently filed against the FDA seeking relief from allegedly ad hoc
drug regulation. The case ended up at trial and generated 2300 pages of testimony and 400
exhibits and declarations.
Notice that some of these issues are not well addressed in the GMP regulations. GMPs
don’t discuss any controls over the management of out of specification results. Process
validation, multiple retests, method validation are all issues that had, at the time, no specific
GMP references. So how does FDA have grounds for any regulatory actions?
45

The Barr Decision
The grounds come from the flexibility of the GMPs. A GMP
requirement like this one can be interpreted to require whatever
measure is necessary to assure that drug products conform to
appropriate standards of identity, strength, quality, and purity.
21 CFR 211.160 (b)
“Laboratory controls shall include the establishment of scientifically
sound and appropriate specifications, standards, sampling plans, and
test procedures designed to assure that components, drug product
containers, closures, in-process materials, labeling, and drug
products conform to appropriate standards of identity, strength,
quality, and purity.”
46

(OOS)
Decision
Judge Wolin, Barr Court Decision
“Ironically, the regulations themselves, whose broad and
sometimes vague instructions allow conflicting, but plausible,
views of the precise requirements, transform what might be a
routine evaluation into an arduous task.”
This issue was addressed at the trial by the FDA Out of Specification (
witness and accepted by Judge Wolin. Industry practice, whatever it
is, must meet the intent of the GMP regulations.
“The Court, however, cannot rely on industry practice alone to determine whether
an individual firm meets the statutory requirement, since industry standards
themselves must be reasonable and consistent with the spirit and intent of the
CGMP regulations.”
(Judge Wolin, Barr Decision) 47

Barr Decision Resulted In:
• Revised FDA Procedures and Policies
• Proposed changes to cGMPs
• Guidance for Investigating Out-of-
Specification (OOS) Test Results for
Pharmaceutical Production – May 2022
• Increased FDA inspections and emphasis
on laboratory operations
48

• FDA expects:
• An immediate and thorough investigation of an OOS
result
• The existence of an OOS SOP – the basic document to
assist in assessing and investigating an OOS result
• An effective Corrective and Preventative Actions (CAPA)
system
• Guidance for Industry: Investigating Out-of-Specification (OOS)
Test Results for Pharmaceutical Production, May 2022
49

SOP 22004
Managing OOS, OOT, or Unexpected Test
Results

Investigations
• OOS investigations are conducted in
phases
• If the initial investigation does not
determine conclusive cause, an
expanded investigation is
conducted

SOP 22004 - Managing OOS, OOT, or
Unexpected Test Results
Initial Investigation Form

SOP 22004 - Managing OOS, OOT, or
Unexpected Test Results
Expanded Investigation Form

Prevent / Minimize
OOS Results?
1. BEFORE YOU START THE ASSAY
2. PERFORMING THE ASSAY
3. REPORTING OF THE ASSAY RESULT
54

How Do You Prevent / Minimize
OOS Results?
1. BEFORE YOU START THE ASSAY
• Must have an approved testing procedure
• Analyst must be properly trained
• Must have appropriate materials, supplies, standards
• Instrumentation must be calibrated and properly maintained
• Sample to be tested must be stored properly and correctly identified
2. PERFORMING THE ASSAY
• Perform the assay according to written approved procedures
• Document work as it is performed
• Document any deviations and unexpected results
• STOP THE TEST if you have made an error that could affect the results – document this.
3. REPORTING OF THE ASSAY RESULT
• Check assay’s system suitability requirements BEFORE reporting results
• Check result against specifications BEFORE DISCARDING TEST SOLUTIONS, STANDARDS,
DILUTIONS, ETC. (Save if OOS)
• Notify your Supervisor immediately if OOS
55

OOS Result Example #1
TEST READ AT THE INCORRECT WAVELENGTH

OOS Result Example #2
MANUFACTURING TECH FORGOT THE INCUBATION
STEP BEFORE FILTRATION

Out-Of-Specification Result Example #3
MANUFACTURING PROCEDURE SPECIFIED THE USE OF
A VIAL/STOPPER COMBINATION THAT LEAKS AND
THEREFORE PERMITS CONTAMINATION

Warning Letter: Out of Specification
During my review, I found that on April 29, 2001
your laboratory obtained an OOS and a retest was
authorized without an explanation.
I requested the justification for the re-testing and your Laboratory
personnel explained to me that they have observed this
OOS result in other lots from the same product.
In the previous investigations, the original OOS value was
invalidated because of “interference in the dissolution vessel”
and the lot was retested. These investigations do not have
analytical data to demonstrate the validity of this
assignable cause.
During the inspection, your laboratory performed a study to
prove this assignable cause and found that this assignable
cause, previously used to invalidate data,
is not valid.
Schering Plough, Puerto Rico
WARNING LETTER
60

OOS
FDA Expects:
• An immediate and thorough investigation following an
OOS result prior to any retesting
• The existence of an SOP – the basic document to
assist in assessing and investigating an OOS result.
̶ What to do when an OOS is detected?
̶ What to document?
̶ How to investigate?
̶ Time Limits?
̶ When does QA get involved?
• Corrective & Preventative Action (CAPA)
̶ To correct the testing process
̶ To correct the manufacturing process
̶ To correct the EXECUTION of the manufacturing process 61

FDA Expects
483 Citation: (OOS investigation time limits)
Following an out-of-specification result for Test A in
the 6-month stability sample of Lot [ABC], the
analyst reported that the “Test FAILED” on the
report sheet and forwarded this to the group leader,
however, no action was taken.
According to the laboratory manager, the sheet
must have been missed and was not discovered for
more than two months.
Source: “FDA API Inspections” by Robert C. Horan, PhD, FDA Pharmaceutical
Inspectorate, New York District.
62

If a process is validated, do you
expect process-related failures ?
NO !
.
.
.
63

WHAT DO YOU THINK OF THIS? OOS
Example
On review of a number of OOSs for potency issues in API XYZ,
it was found that this was attributed to failure of temperature
sensors on manufacturing equipment XXX and that the
temperature had been out of the critical control range.
In reviewing other deviation reports, it was found that following
earlier episodes of ‘OOS” potency values, there were corrective
actions recommended including one to increase the frequency
of calibrations of the sensing devices.
Examination of the applicable SOPs found these
recommendations have not been implemented and no other
corrective action taken.
Source: “FDA API Inspections” by Robert C. Horan, PhD,
FDA Pharmaceutical Inspectorate, New York District.
64

Calibration of pH meter ABC is performed
using buffers at pH 4.0, 7.0, and 9.0 before
testing the pH of product XYZ that has an
expected pH around 12.
65
WHAT DO YOU THINK OF THIS? pH
Example

pH Example Outcome
Since February 1999 all stability batches of Gentocin otic solution have
revealed a contamination of the product in the form of an unknown peak
in the Betamethasone Valerate assay.
The investigation conducted by the firm concluded that the product was
contaminated with DCHP. They also concluded that the DCHP was
leaching from the adhesive used to adhere the label through the
product container.
483 citation, Feb 2001 (edited), Schering-Plough, Puerto Rico
66

pH Example Outcome (Continued)
Even though the company investigated the issue
and determined the cause, FDA still issued a 483.
“There is no evidence the firm has determined the effect
the leaching may have on all other products which use the
same container and label adhesive combination.”
483 citation, Feb 2001 (edited), Schering-Plough, Puerto Rico
67

WHAT DO YOU THINK OF THIS?
Procedure vs Data Example
The testing procedure states to run the
chromatogram for not less than 2.5 times the
retention time of the drug.
Review of earlier test data shows that a significant
recurring impurity elutes at approximately 5 times the
retention time of the bulk drug.
The laboratory staff is performing the procedure
according to their SOP.
68

Procedure vs Data Example
Outcome
This became a 483 citation. Testing procedures are
required to be scientifically sound. If the
chromatogram is not specified to run at least 5 times
the retention time of the bulk drug, the impurity that
could be present in the drug would go undetected.
69

WHAT DO YOU THINK OF THIS?
Procedure for OOS Example
Manufacturer’s procedure for handling OOS results:
1) If an identified cause for the OOS is not
determined or not confirmed, than a second
analyst will test a new sample.
2) If the second sample meets specification, the
conclusion is made that the original sampling was
flawed.
3) If the new sample fails also, the Lab Supervisor
starts an OOS Report Form.
70

Procedure for OOS Example Outcome
Just because the second sample meets specs
is not enough evidence to conclude that the
original sampling was flawed.
(What could you do to confirm or refute that the
original sample was flawed? – test the old and
new sample in parallel).
An OOS report must start before retesting
occurs.
71

Subpart J
Records & Reports - Laboratory Records
• Laboratory records shall include complete data from all tests
necessary to assure compliance with established specifications,
standards
• Records shall be maintained for modifications of established
testing methods.
- Reason for modification
- Data to verify that change is at least as accurate and
reliable as the previous method
• Maintain records of testing and standardization of reference
standards, reagents, standard solutions.
• Maintain records of calibration of lab instruments, etc.
• Maintain records of all stability testing
72

Records & Reports -
Laboratory Records
continued
Laboratory records shall include complete data from all tests necessary to
assure compliance with established specifications, standards. Complete date
includes:
• Description of sample
• Method used for testing
• Location of data to show that the method is accurate and reliable under actual
conditions of use.
• Weight or measure of sample used for testing, where appropriate.
• All data obtained for each test (graphs, charts, spectra - properly identified)
• Calculations (units, conversion factors, and equivalency factors)
• Actual results of tests and whether they meet specifications
• Initials or signatures of analyst and the date.
• Initials or signature of verifier (signifying that records have been reviewed for
accuracy, completeness, and compliance with established standards) and the
date.
73

Warning Letter: Lab Records
74
Failure to maintain laboratory records that
include complete data from all tests necessary
to assure compliance with established
specifications and standards.
Opti-Med CR Labs, Inc.,
Seymour, IN

Warning Letter: Review of Test Data
There is no provision for review of test data
and results prior to final release to the
customer as a Certificate of Analysis.
Earlham College,
Richmond, VA
75

APPLICATION
…technician notices that the equipment he plans to use for
the testing of raw material A is outside of its calibration
period. He decides that he will perform the testing anyway
and if the result is out of specification, he will invalidate the
result based on the out of calibration equipment. If the
result is in-spec, he will have saved some time.
…..Is this OK?
ANSWER:
No. You can not continue a testing processes knowing that
you have an assignable cause for an out-of-spec result.
76

Another Scenario
77
Analyst Bob obtained an OOS result. He knows that he needs to perform
an investigation with his supervisor to determine if any laboratory error
has occurred. In the meantime, to save time, Bob decides to perform
retests. If there is lab error, he’ll already have results to report, and he will
have saved time.
If they can’t find lab error, he didn’t do any harm.
Is this OK?
ANSWER:
No. The first step in dealing with an OOS event is to determine if you
have conducted the laboratory testing properly. Retesting cannot be
performed until an investigation has been conducted to at least identify
obvious sources of laboratory error. Since retesting in this example
started before any investigation was conducted, a violation of GMPs
exists.

Laboratory Controls
Application
A Company obtained an OOS result for Drug Z at its 6-month stability test point.
Additional samples of Drug Z were pulled from inventory for testing.
Some of these also generated OOS results.
From ALL of the results of ALL of the samples tested, an average was calculated,
and the average was within specification.
Was this event handled appropriately?
ANSWER:
No. At the first OOS event, an investigation MUST be conducted to
determine the cause of the problem. Averaging is a problem. Unless
your test method would direct you to average results, averaging results
to attempt to obtain a conforming value is NOT APPROPRIATE.
(Bristol-Myers Squibb, Warning Letter Oct 2002.)
78

This is the end of the presentation
Please contact BQA Management if you have any questions.
79

GMP Module 123123- Laboratory Controls.pptx

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