these slides discuss
Impurity profiling
Degradation characterization
Stability testing & Accelerated stability testing (ICH)
Evaluation of the test (shelf life)
analytical method development
ICH vs USP definition
methods for identification
method for the isolation of the impurity
factors affecting the degradation of formulation
What is degradation characterization
general protocol of degradation conditions used for drug substance and drug product
Degradation conditions
Stress testing
Container closure system
University Institute of Pharmaceutical Sciences is a flag bearer of excellence in Pharmaceutical education and research in the country. Here is another initiative to make study material available to everyone worldwide. Based on the new PCI guidelines and syllabus here we have a presentation dealing with basics impurity profiling and degradent characterization.
Thank you for reading.
Hope it was of help to you.
UIPS,PU team
POTENTIAL SOURCES OF ELEMENTAL IMPURITIESMehulJain143
INTRODUCTION
INDENTIFICATION OF POTENTIAL ELEMENTAL IMPURITIES
FACTORS AFFECTING
EVALUATION
RISK ASSESSMENT AND CONTROL OF ELEMENTAL IMPURITIES
GENERAL PRINCIPLES
University Institute of Pharmaceutical Sciences is a flag bearer of excellence in Pharmaceutical education and research in the country. Here is another initiative to make study material available to everyone worldwide. Based on the new PCI guidelines and syllabus here we have a presentation dealing with basics impurity profiling and degradent characterization.
Thank you for reading.
Hope it was of help to you.
UIPS,PU team
POTENTIAL SOURCES OF ELEMENTAL IMPURITIESMehulJain143
INTRODUCTION
INDENTIFICATION OF POTENTIAL ELEMENTAL IMPURITIES
FACTORS AFFECTING
EVALUATION
RISK ASSESSMENT AND CONTROL OF ELEMENTAL IMPURITIES
GENERAL PRINCIPLES
In this slide contains Methods of Detection of Natural, Permitted and Non Permitted Dyes.
Presented by: P.SUDHEER KUMAR (Department of pharmaceutical analysis).
RIPER, anantapur
Rationale for the reporting and control of degradationDurgadevi Ganesan
Rationale for the reporting and control of degradation, Reporting procedure, Identification of degradation products, Threshold for degradation products in new drug products, Analytical procedure, Reporting degradation products contents of batches.
Assay of adsorbed diptheria vaccine and adsorbed tetanusRAGHAV DOGRA
diphtheria and tetanus vaccine, assay method, lethal dose method, Method A. challenge toxins in the guinea pig, Method B. challenge toxins in mice, Determination of antibodies in the guinea pig, guidelines .
Introduction to Absorbed Tatanus Vaccine
Principle, Assay methods of ATV, Preparation, Symptoms,
Causes, Risk factor, Complications
Presnted by
SHAIK GOUSE UL AZAM
Department of Pharmaceuticals Analysis
In this slide contains introduction and various methods for analysis of milk.
Presented by: KHALID KUWAITY (Department of pharmaceutical analysis).
RIPER, anantapur
In this slide contains Study of Quality of Raw Materials and General methods of analysis of Raw materials used in cosmetic manufacture as per BSI
Presented by: P.PAVAN KALYAN (Department of pharmaceutical analysis).RIPER, anantapur
University Institute of Pharmaceutical Sciences is a flag bearer of excellence in Pharmaceutical education and research in the country. Here is another initiative to make study material available to everyone worldwide. Based on the new PCI guidelines and syllabus here we have a presentation dealing with qualifications of HPLC which is the " High Performance Liquid Chromatography".
Thank you for reading.
Hope it was of help to you.
UIPS,PU team
Forced degradation studies for drug substances and drug products a regulator...Veeprho Laboratories
Introduction –
Various regulatory guidance are available which provides useful definitions and general comments about degradation studies. However, guidance concerning the scope, timing, degradation condition and best practices for degradation studies is very general. Various issues related to stress testing are addressed in numerous guidance documents but not always in the context of stress testing. Therefore, stress-testing conditions should be realistic and not excessive.
The forced degradation studies are also expected -
1. Structure elucidation of possible degradation path-ways.
2. Identification of degradation products that may be spontaneously generated during drug storage and during use.
3. To facilitate improvements in the manufacturing process and formulations in parallel with accelerated pharmaceutical stability studies.
In this slide contains Methods of Detection of Natural, Permitted and Non Permitted Dyes.
Presented by: P.SUDHEER KUMAR (Department of pharmaceutical analysis).
RIPER, anantapur
Rationale for the reporting and control of degradationDurgadevi Ganesan
Rationale for the reporting and control of degradation, Reporting procedure, Identification of degradation products, Threshold for degradation products in new drug products, Analytical procedure, Reporting degradation products contents of batches.
Assay of adsorbed diptheria vaccine and adsorbed tetanusRAGHAV DOGRA
diphtheria and tetanus vaccine, assay method, lethal dose method, Method A. challenge toxins in the guinea pig, Method B. challenge toxins in mice, Determination of antibodies in the guinea pig, guidelines .
Introduction to Absorbed Tatanus Vaccine
Principle, Assay methods of ATV, Preparation, Symptoms,
Causes, Risk factor, Complications
Presnted by
SHAIK GOUSE UL AZAM
Department of Pharmaceuticals Analysis
In this slide contains introduction and various methods for analysis of milk.
Presented by: KHALID KUWAITY (Department of pharmaceutical analysis).
RIPER, anantapur
In this slide contains Study of Quality of Raw Materials and General methods of analysis of Raw materials used in cosmetic manufacture as per BSI
Presented by: P.PAVAN KALYAN (Department of pharmaceutical analysis).RIPER, anantapur
University Institute of Pharmaceutical Sciences is a flag bearer of excellence in Pharmaceutical education and research in the country. Here is another initiative to make study material available to everyone worldwide. Based on the new PCI guidelines and syllabus here we have a presentation dealing with qualifications of HPLC which is the " High Performance Liquid Chromatography".
Thank you for reading.
Hope it was of help to you.
UIPS,PU team
Forced degradation studies for drug substances and drug products a regulator...Veeprho Laboratories
Introduction –
Various regulatory guidance are available which provides useful definitions and general comments about degradation studies. However, guidance concerning the scope, timing, degradation condition and best practices for degradation studies is very general. Various issues related to stress testing are addressed in numerous guidance documents but not always in the context of stress testing. Therefore, stress-testing conditions should be realistic and not excessive.
The forced degradation studies are also expected -
1. Structure elucidation of possible degradation path-ways.
2. Identification of degradation products that may be spontaneously generated during drug storage and during use.
3. To facilitate improvements in the manufacturing process and formulations in parallel with accelerated pharmaceutical stability studies.
An Analysis on the UV-Visible Spectrophotometry MethodAI Publications
In the pharmaceutical industry, quality control is a necessary process. Pharmaceutical medicinal products must be advertised as safe, therapeutically active formulations with predictable qualities and performance. The main aim of the study is an analysis on the UV-Visible Spectrophotometry Method. UV spectroscopy was performed on Shimadzu 1700 uv spectrometer, 1cm cell quartz cuvette. Mode was set as UV mode and Detector wavelength was kept at 231 nm and 276 nm. A simple, rapid, accurate, sensitive and cost economical methodology for simultaneous estimation and precise ultraviolet radiation methodology has been developed and valid as per ICH guidelines for simultaneous Estimation of MET and AGP in Their Combined dose form.
A Review on Step-by-Step Analytical Method Validationiosrphr_editor
When analytical method is utilized to generate results about the characteristics of drug related samples it is essential that the results are trustworthy. They may be utilized as the basis for decisions relating to administering the drug to patients. Analytical method validation required during drug development and manufacturing and these analytical methods are fit for their intended purpose. To comply with the requirements of GMP pharmaceutical industries should have an overall validation policy which documents how validation will be performed. The purpose of this validation is to show that processes involved in the development and manufacture of drug, production and analytical testing can be performed in an effective and reproducible manner. This review article provides guidance on how to perform validation characteristics for the analytical method which are utilized in pharmaceutical analysis.
BOC Sciences Updated Its Product Catalog of Pharmaceutical Impurity Reference...BOC Sciences
BOC Sciences recently updated its product list of pharmaceutical impurity reference standards to better serve pharmaceutical companies, scientific research units, testing institutions and universities. Visit https://www.bocsci.com/products/impurities-8.html for more information.
Regulatory Considerations for Excipients used in Lipid NanoparticlesMerck Life Sciences
Lipid excipients and delivery systems such as lipid nanoparticles (LNPs) are essential for a wide variety of therapeutics including mRNA vaccines and therapeutics and gene therapy.
The purity and safety of novel, synthetic lipid excipients must be demonstrated due to their central role in the function of the drug product, distinct physicochemical properties, and the potential for interaction with other ingredients or the physicochemical environment. These excipients must comply with challenging and complex regulatory requirements, similar to those expected of the active pharmaceutical ingredient itself.
This whitepaper provides an overview of the regulatory classification of lipid nanoparticles, liposomes and novel excipients. Specific requirements outlined in guidance documents are shared along with strategies to stay ahead of emerging regulatory challenges.
To find more information about synthetic lipids for pharmaceutical applications and gene therapy, please visit our website:
https://www.sigmaaldrich.com/DE/en/products/pharma-and-biopharma-manufacturing/formulation/synthetic-lipids
https://www.sigmaaldrich.com/US/en/products/pharma-and-biopharma-manufacturing/formulation/synthetic-lipids
TOXICOKINETICS & SATURATION KINETICS
Objective
To describe the systemic exposure achieved in animals and its relationship to dose level and time course of the toxicity study
To relate the exposure achieved in toxicity studies to toxicological findings and contribute to assessment of human safety clinically
To provide information which, in conjunction with the toxicity findings contributes to the design of subsequent non- clinical toxicity studies
Biological test and assay tetanus toxoid adsorbed ShameerAbid
these slides talked about the tests and assay method for tetanus toxoid adsorbed
Tetanus Toxoid
What Is Bioassay/Biological Assay?
Potency in guinea pigs and mice by the challenge
(lethal and paralysis)
Validity of the test
Validation and suitability
Other methods
Acronyms
Validation of utility system (water system)ShameerAbid
these slides talked about the validation of utility systems in pharmaceutical industries
with special emphasis on the water system
helpful for pharmaceutical student
chromatography general principles and comparison - specially about gas chrom...ShameerAbid
these sides discuss chromatography with special emphasis on gas chromatography
fundamentals
general principles
comparison of different chromatographic techniques
Pulmonary Thromboembolism - etilogy, types, medical- Surgical and nursing man...VarunMahajani
Disruption of blood supply to lung alveoli due to blockage of one or more pulmonary blood vessels is called as Pulmonary thromboembolism. In this presentation we will discuss its causes, types and its management in depth.
HOT NEW PRODUCT! BIG SALES FAST SHIPPING NOW FROM CHINA!! EU KU DB BK substit...GL Anaacs
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Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Title: Sense of Smell
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the primary categories of smells and the concept of odor blindness.
Explain the structure and location of the olfactory membrane and mucosa, including the types and roles of cells involved in olfaction.
Describe the pathway and mechanisms of olfactory signal transmission from the olfactory receptors to the brain.
Illustrate the biochemical cascade triggered by odorant binding to olfactory receptors, including the role of G-proteins and second messengers in generating an action potential.
Identify different types of olfactory disorders such as anosmia, hyposmia, hyperosmia, and dysosmia, including their potential causes.
Key Topics:
Olfactory Genes:
3% of the human genome accounts for olfactory genes.
400 genes for odorant receptors.
Olfactory Membrane:
Located in the superior part of the nasal cavity.
Medially: Folds downward along the superior septum.
Laterally: Folds over the superior turbinate and upper surface of the middle turbinate.
Total surface area: 5-10 square centimeters.
Olfactory Mucosa:
Olfactory Cells: Bipolar nerve cells derived from the CNS (100 million), with 4-25 olfactory cilia per cell.
Sustentacular Cells: Produce mucus and maintain ionic and molecular environment.
Basal Cells: Replace worn-out olfactory cells with an average lifespan of 1-2 months.
Bowman’s Gland: Secretes mucus.
Stimulation of Olfactory Cells:
Odorant dissolves in mucus and attaches to receptors on olfactory cilia.
Involves a cascade effect through G-proteins and second messengers, leading to depolarization and action potential generation in the olfactory nerve.
Quality of a Good Odorant:
Small (3-20 Carbon atoms), volatile, water-soluble, and lipid-soluble.
Facilitated by odorant-binding proteins in mucus.
Membrane Potential and Action Potential:
Resting membrane potential: -55mV.
Action potential frequency in the olfactory nerve increases with odorant strength.
Adaptation Towards the Sense of Smell:
Rapid adaptation within the first second, with further slow adaptation.
Psychological adaptation greater than receptor adaptation, involving feedback inhibition from the central nervous system.
Primary Sensations of Smell:
Camphoraceous, Musky, Floral, Pepperminty, Ethereal, Pungent, Putrid.
Odor Detection Threshold:
Examples: Hydrogen sulfide (0.0005 ppm), Methyl-mercaptan (0.002 ppm).
Some toxic substances are odorless at lethal concentrations.
Characteristics of Smell:
Odor blindness for single substances due to lack of appropriate receptor protein.
Behavioral and emotional influences of smell.
Transmission of Olfactory Signals:
From olfactory cells to glomeruli in the olfactory bulb, involving lateral inhibition.
Primitive, less old, and new olfactory systems with different path
These simplified slides by Dr. Sidra Arshad present an overview of the non-respiratory functions of the respiratory tract.
Learning objectives:
1. Enlist the non-respiratory functions of the respiratory tract
2. Briefly explain how these functions are carried out
3. Discuss the significance of dead space
4. Differentiate between minute ventilation and alveolar ventilation
5. Describe the cough and sneeze reflexes
Study Resources:
1. Chapter 39, Guyton and Hall Textbook of Medical Physiology, 14th edition
2. Chapter 34, Ganong’s Review of Medical Physiology, 26th edition
3. Chapter 17, Human Physiology by Lauralee Sherwood, 9th edition
4. Non-respiratory functions of the lungs https://academic.oup.com/bjaed/article/13/3/98/278874
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
ARTIFICIAL INTELLIGENCE IN HEALTHCARE.pdfAnujkumaranit
Artificial intelligence (AI) refers to the simulation of human intelligence processes by machines, especially computer systems. It encompasses tasks such as learning, reasoning, problem-solving, perception, and language understanding. AI technologies are revolutionizing various fields, from healthcare to finance, by enabling machines to perform tasks that typically require human intelligence.
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Ve...kevinkariuki227
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
TEST BANK for Operations Management, 14th Edition by William J. Stevenson, Verified Chapters 1 - 19, Complete Newest Version.pdf
- Video recording of this lecture in English language: https://youtu.be/lK81BzxMqdo
- Video recording of this lecture in Arabic language: https://youtu.be/Ve4P0COk9OI
- Link to download the book free: https://nephrotube.blogspot.com/p/nephrotube-nephrology-books.html
- Link to NephroTube website: www.NephroTube.com
- Link to NephroTube social media accounts: https://nephrotube.blogspot.com/p/join-nephrotube-on-social-media.html
Hemodialysis: Chapter 3, Dialysis Water Unit - Dr.Gawad
Impurity profiling and degradent characterization {presented by shameer m.pharm,p.analysis 1 st year 1 st sem session 2020 2021}
1. Submitted to :- Prof. Gita Chawla
Submitted by :- Shameer
Department :- Master of pharmacy (P.Analysis)
Sem/year :- 1sem/1year
2. Impurity profiling
Degradation characterization
Stability testing & Accelerated stability testing
(ICH)
Evaluation of the test (shelf life)
3. Bulk drug industry forms base of all pharmaceutical
industries as it is the source of active
pharmaceutical ingredients (APIs) of specific quality
The major challenge for both bulk drug industries
and pharmaceutical industries is to produce quality
products.
Over the last few decades much attention is paid
towards the quality of pharmaceuticals that enter
the market.
To maintain and have a control over the quality and
purity of the pharmaceuticals products/ bulk drug
4. Purity of active pharmaceutical ingredient
depends on several factors such as:-
Concept of purity
changes with time and
it is inseparable from
the developments I
analytical chemistry
The pharmacopoeias
specify not only purity
but also puts limits
which can be very
stringent on levels of
various impurities.
5. Impurities in pharmaceuticals are unwanted chemicals
that remain with the Active Pharmaceutical Ingredients
(APIs) or develop during formulation or develop upon
ageing of both APIs and formulated APIs to medicines .
The presence of these unwanted chemicals even in
small amounts may influence the efficacy and safety of
the pharmaceutical products
Impurity profile is description of the identified and
unidentified impurities present in a typical batch of API
produced by a specific controlled production process
6. New technology for manufacturing an existing drug it is essential to know the
structures of the impurities (by possessing the information synthetic organic
chemists are often able to change the reaction conditions in such a way that the
formation of the impurity can be avoided or its quantity reduced to an acceptable level)
Having suggested structures for the impurities, they can be synthesized and
thus provide final evidence for their structures previously determined by
spectroscopic methods.
The material synthesized can be used as an ‘impurity standard’ during
development of a selective method for the quantitative determination of the
impurity and the use of this method as part of the quality control testing of
every batch.
In case of major impurities the synthesized or isolated material can be
subjected to toxicological studies thus greatly contributing to the safety of drug
therapy.
For drug authorities the impurity profile of a drug substance is a good
fingerprint to indicate the level and constancy of the manufacturing process of
the bulk drug substance
7.
8.
9. New drug development
requires meaningful and
reliable analytical data to
be produced at various
stages of the
development
10.
11. The key objective of this is to provide clarity to the overall life cycle,
qualification and governance of reference standards used in
development and control of new drugs.
Reference standards serve as the basis of evaluation of both
process and product performance and are the benchmarks for
assessment of drug safety for patient consumption.
These standards are needed, not only for the active ingredients in
dosage forms but also for impurities, degradation products, starting
materials, process intermediates, and excipients.
12. These are the methods that are used routinely for
characterizing impurities.
13. These are the methods that are adopted for the separation
14. It is often necessary to isolate
impurities.
Generally, chromatographic and non-
chromatographic techniques are
used for isolation of impurities prior
its characterization
The term ‘chromatographic reactor’
refers to the use of an analytical-
scale column as both a flow through
reactor, and simultaneously, as
separation medium for the reactant(s)
15.
16. Highly sophisticated instrumentation, such as MS
attached to a GC or HPLC, are inevitable tools in
the identification of minor components (drugs,
impurities, degradation products, metabolites) in
various matrices.
Different techniques that are used for the
characterization of impurities are:-
NMR
MS
Hyphenated
methods
17. The ability of NMR to provide information regarding the specific
bonding structure and stereochemistry of molecules of pharmaceutical
interest has made it a powerful analytical instrument for structural
elucidation.
The ability of NMR- based diffusion coefficient determination to
distinguish between monomeric and dimeric substances was validated
using a standard mixture of authentic materials containing both
monomers and dimers
Unfortunately, NMR has traditionally been used as a less sensitive
method compared to other analytical techniques. Conventional sample
requirements for NMR are on the order of 10 mg, as compared with MS,
which requires less than 1 mg.
18. It has an increasingly significant impact on the pharmaceutical
development process over the past several decades.
Advances in the design and efficiency of the interfaces, that directly
connect separation techniques with Mass Spectrometers have afforded
new opportunities for monitoring, characterizing, and quantification of
drug related substances in active pharmaceutical ingredients and
pharmaceutical formulations.
If single method fails to provide the necessary selectivity, orthogonal
coupling of chromatographic techniques such as HPLC-TLC and HPLC-
CE, or coupling of chromatographic separations with information rich
spectroscopic methods such as HPLC-MS or HPLC-NMR may need to be
contemplated, but hopefully only as a development tool rather than a tool
for routine QC use.
19. LC-MS-MS
HPLC-DAD-MS
HPLC-DAD-NMR-MS
GC-MS
LC-MS
A common goal for investigation of both
process and product degradation-related
impurities is to determine which of the
many potential impurities are, in fact,
produced in the manufacturing process
and which occur under a given set of
storage conditions.
20. According to ICH guidelines on
impurities in new drug products,
identification of impurities below 0.1%
level, is not considered to be necessary,
unless potential impurities are expected
to be unusually potent or toxic.
According to ICH, the maximum daily
dose qualification threshold to be
considered is as follows as shown in
table no.2-5;< 2g/day 0.1 % or 1 mg per
day intake (whichever is lower) >2g/day
21. It is describes as phenomena of
change in physiochemical properties
of any substance under study due to
various environmental factors or
interaction between the different
component of the formulation it can
lead to :-
22. These are the products formed as a
result of the degradation of the
substance under study. These can be
sometimes just hydrolyzed or oxidized
products of actual substance whereas in
some cases degradation products can
be highly altered molecules on chemical
basis arising from the parent substance
molecules
23. Storage temperature
Humidity and moisture conditions
Photolytic degradation
pH of the formulation
Interaction between components
Microbial contamination
Interaction with the containers and closure system
24. This involve complete profiling of the
degradation product formed in the
formulation
Degradation products are impurities
in our formulation that arises due to
degradation of drug substances as
well as any excipients in the
formulation .so they are also
characterized as impurities and their
profiles are also maintained as per
impurity profiling guidelines
25. Forced degradation studies are
carried out to achieve the following
purposes:
To establish degradation pathway of drug substances and drug products
To differentiate degradation products that are related to drug products
from those that are generally from the non-drug product in a formulation
To elucidate the structure of degradation products
To determine the intrinsic stability of a drug substance in the
formulation
To reveal the degradation mechanisms such as hydrolysis oxidation,
hemolysis or photolysis of the drug substance and drug products
26.
27. It is very important to know when to perform forced
degradation studies for the development of new drug
substance and new drug product.
FDA guidance states that stress testing should be
performed in phase III of regulatory submission
process.
Stress studies should be done in different pH
solutions, in the presence of oxygen and light, and at
elevated temperatures and humidity levels to
determine the stability of the drug substance.
These stress studies are conducted on a single
batch. The results should be summarized and
submitted in an annual report
An early stress study also gives timely
recommendations for making improvements in the
manufacturing process and proper selection of
stability-indicating analytical procedures
28. Degradation of drug substances between 5% and
20% has been accepted as reasonable for
validation of chromatographic assays
Some pharmaceutical scientists think 10%
degradation is optimal for use in analytical
validation for small pharmaceutical molecules for
which acceptable stability limits of 90% of label
claim is common
No such limits for physiochemical changes, loss
of activity or degradation during shelf life have
been established for individual types or groups
of biological products
Protocols for generation of product-related
degradation may differ for drug substance and
drug product due to differences in matrices and
concentrations. It is recommended that
maximum of 14 days for stress testing in
solution (a maximum of 24 h for oxidative tests)
29. Frist of all keep in mind that Forced
degradation is carried out to produce
representative samples for developing
stability-indicating methods for drug
substances and drug products.
The choice of stress conditions should
be consistent with the product's
decomposition under normal
manufacturing, storage, and use
conditions which are specific in each
case
31. A minimal list of stress factors suggested for forced
degradation studies must include acid and base
hydrolysis, thermal degradation, photolysis,
oxidation and may include freeze- thaw cycles and
shear (There is no specification in regulatory guidelines about the
conditions of pH, temperature and specific oxidizing agents to be
used)
The design of photolysis studies is left to the
applicant's discretion although Q1 B specifies that
the light sources should produce combined visible
and ultraviolet (UV,320–400 nm) outputs and that
exposure levels should be justified
The initial trial should have the aim to come upon
32. Some scientists have found it practical to begin with
extreme conditions such as 80°C or even higher
temperatures and testing at shorter (2,5,8,24h,etc.) multiple
time points, so that the rate of degradation can be evaluated
(The primary degradants and their secondary degradations products can
be distinguished by testing at early time points and thus help in a better
degradation pathway determination)
In another approach degradation is started by considering
the drug substance to be liable and doing degradation at
the condition mentioned in previous slide. Then stress would
be increased or decreased to obtain sufficient degradation
33. As compared to harsher conditions and
less time approach, this strategy is better
due to the following reasons
(a) there may be a change in mechanism of reaction when a
harsh condition is used
(b) there is a practical problem in neutralizing or diluting
every sample, when it contains a high concentration of
reactants, e.g., acid or base, before an injection can be
made on the HPLC column.
Both these reasons are strong enough to
suggest that as normal as possible conditions
should be used for causing the decomposition
of the drug
Studies should be repeated when formulations
or methods change because the change may
34. Which concentration of drug should be used for degradation
study has not been specified in regulatory guidance.
It is recommended that the studies should be initiated at a
concentration of 1mg/mL
But why ?
it is usually possible to get even minor decomposition
products in the range of detection
It is suggested that some degradation studies should also be
done at a concentration which the drug is expected to be
present in the final formulations
36. Hydrolysis is one of the most common degradation
chemical reactions over a wide range of pH . Hydrolysis is
a chemical process that includes decomposition of a
chemical compound by reaction with water. Hydrolytic
study under acidic and basic condition involves catalysis
of ionizable functional groups present in the molecule.
Acid or base stress testing involves forced degradation of
a drug substance by exposure to acidic or basic
conditions which generates primary degradants in
desirable range
If the compounds for stress testing are poorly soluble in
water, then co-solvents can be used to dissolve them in
HCl or NaOH. The selection of co-solvent is based on the
drug substance structure.
Stress testing trial is normally started at room temperature
and if there is no degradation, elevated temperature (50–
70°C) is applied. Stress testing should not exceed more
than 7 days. The degraded sample is then neutralized
using suitable acid, base or buffer , to avoid further
37. Hydrogen peroxide is widely used for
oxidation of drug substances in forced
degradation studies but other oxidizing
agents such as metal ions, oxygen, and
radical initiators (e.g., azobisisobutyroni-
trile, AIBN) can also be used.
Selection of an oxidizing agent, its
concentration, and conditions depends on
the drug substance. It is reported that
subjecting the solutions to 0.1–3%
hydrogen peroxide at neutral pH and room
temperature for seven days or up to a
maximum 20% degradation could
potentially generate relevant degradation
products
38. The photostability testing of drug
substances must be evaluated to
demonstrate that a light exposure does not
result in unacceptable change.
Photostability studies are performed to
generate primary degradants of drug
substance by exposure to UV or
fluorescent conditions. Some
recommended conditions for photostability
testing are described in ICH guidelines
The most commonly accepted wavelength
of light is in the range of 300– 800 nm to
cause the photolytic degradation
39. Thermal degradation (e.g., dry heat and wet heat)
should be carried out at more strenuous
conditions than recommended ICH Q1A
accelerated testing conditions
Samples of solid-state drug sub- stances and
drug products should be exposed to dry and wet
heat, while liquid drug products should be
exposed to dry heat
Studies may be conducted at higher
temperatures for a shorter period
Effect of temperature on thermal degradation of a
substance is studied through the Arrhenius
equation:
k ¼ Ae
where k is specific reaction rate, A is frequency
factor, Ea is energy of activation, R is gas
constant(1.987cal/ deg mole)and T is absolute
-Ea/rt
40. Document degradants an mechanism (prepare report and share
degradation structures, mechanism, in degradation database)
Identify degradants (utilize LC-MS,LC-NMR, preparative isolation: column
chromatography, TLC perp-LC and synthesis to identify unknown degradants)
Select key degradants/track peaks (determine the key degradants
{primary degradants :10% of total degradants across orthogonal methods)
Evaluate purity/potency (obtain purity/potency data including mass balance
where appropriate. Determine purity of the main band using diode array and LC-MS)
Challenge methodology (perform HPLC screening of the degradation samples
using suitable screening method)
Perform experiments (sample at appropriate point using reasonable stress
condition)
Design protocol (develop forced degradation protocol based on the chemistry (CAMEO) of
the API /drug product formulation)
Predict degradants (predicts most likely degradants using the degradation database,
CAMEO and organic chemistry knowledge)
41. Forced degradation studies provide knowledge about
possible degradation pathways and degradation products
of the active ingredients and help elucidate the structure of
the degradants.
Degradation products generated from forced degradation
studies are potential degradation products that may or
may not be formed under relevant storage conditions but
they assist in the developing stability indicating method
It is better to start degradation studies earlier in the drug
development process to have sufficient time to gain more
information about the stability of the molecule.
This information will in-turn help improve the formulation
manufacturing process and determine the storage
conditions .
As no specific set of conditions is applicable to all drug
products and drug substances and the regulatory guidance
does not specify about the conditions to be used, this
study requires the experimenter to use common sense .
The aim of any strategy used for forced degradation is to
produce the desired amount of degradation i.e.,5–20%.
A properly designed and executed forced degradation
42. The purpose of stability testing is to provide
evidence of how the quality of an API or FPP
varies with time under the influence of a variety of
environmental factors such as temperature,
humidity and light
The stability testing program also includes the
study of product-related factors that influence its
quality, for example, interaction of the API with
excipients, container-closure systems and
packaging materials
43. The selection of potential attributes
and time points to be tested should be
justified.
The retest period or shelf life
assigned to the API by the API
manufacturer should be derived from
stability testing data.
44. By performing the stability testing of the
API one can identify the likely
degradation products
{which in turn help in the establishment
of the degradation pathways and the
intrinsic stability of the molecule and
validate the stability-indicating power of
the analytical procedure used}
The nature of the stress testing will
depend on the individual API and the
type of FPP involved.
45. For an API the following
approaches may be used:
when available, it is acceptable to provide the relevant data
published in the scientific literature to support the identified
degradation products and pathways
when no published data are available, stress testing should be
performed.
Stress testing may be carried out on a single batch of the API
It should include the effect of temperature {50°C-60°C}, humidity {75%
RH or greater} and where appropriate, oxidation and photolysis of the
API.
The testing should also evaluate the susceptibility of the API to
hydrolysis across a justified range of pH values when in solution or
suspension
46. The objective of stress testing is to identify primary degradation
products and not to completely degrade the API.
The conditions studied should cause degradation to occur to a
small extent, typically 10–30% loss of API as determined by
assay when compared with non-degraded API
Results from these studies will form an integral part of the
information provided to regulatory authorities
47. Three batches are chosen
The batches should be manufactured at
a minimum of pilot scale by the same
synthesis route as production batches,
and using a method of manufacture and
a procedure that simulates the final
process to be used for production
batches.
48. The stability studies should be conducted
on the API packaged in a container closure
system that is the same as, or simulates,
the packaging proposed for storage and
distribution.
49. Stability studies should include testing of
stability-indicating attributes of the API, i.e.
those that are susceptible to change during
storage and are likely to influence quality,
safety and/or efficacy. The testing should
cover, as appropriate, the physical,
chemical, biological and microbiological
attributes
50. Tablets : Dissolution, disintegration, water content and
hardness/friability. Dispersible tablets should additionally be
tested for disintegration (with a limit of not more than 3
minutes) and fineness of dispersion
Capsules: (hard gelatin capsules) brittleness, dissolution,
disintegration, water content and level of microbial
contamination
(soft gelatin capsules) dissolution, disintegration, level of
microbial contamination, pH, leakage and pellicle formation.
Oral solutions, suspensions and emulsions
Formation of precipitate, clarity (for solutions), pH, viscosity,
extractables, level
of microbial contamination
51. Powders and granules for oral solution or suspension:
Water content and reconstitution time
Metered-dose inhalers and nasal aerosols: Dose content
uniformity, labeled number of medication actuations per
container meeting dose content uniformity, aerodynamic
particle size distribution, microscopic evaluation, water
content, leak rate, level of microbial contamination, valve
delivery (shot weight), extractables / leachables from
plastic and elastomeric components, weight loss, pump
delivery, foreign particulate matter and extractables/
leachables from plastic and elastomeric components of
the container, closure and pump. Samples should be
stored in upright and inverted/on-the-side orientations
52. Nasal sprays: solutions and suspensions : Clarity (for solution), level of
microbial contamination, pH, particulate matter, unit spray medication
content uniformity, number of actuations meeting unit spray content
uniformity per container, droplet and/or particle size distribution, weight
loss, pump delivery, microscopic evaluation (for suspensions), foreign
particulate matter and extractables/leachables from plastic and
elastomeric components of the container, closure and pump
Topical, ophthalmic and otic preparations:
Included in this broad category are ointments, creams, lotions, pastes, gels,
solutions, eye drops and cutaneous sprays
Topical preparations should be evaluated for clarity, homogeneity, pH,
suspendability (for lotions), consistency, viscosity, particle size
distribution (for suspensions, when feasible), level of microbial
contamination/sterility and weight loss (when appropriate).
Evaluation of ophthalmic or otic products (e.g. creams, ointments,
solutions and suspensions) should include the following additional
attributes: sterility, particulate matter and extractable volume.
Evaluation of cutaneous sprays should include: pressure, weight loss,
net weight dispensed, delivery rate, level of microbial contamination,
spray pattern, water content and particle size distribution (for
suspensions
53. Suppositories: Disintegration and dissolution (at
37 °C) and as appropriate for the type, net filled
content, rupture time, melting and solidification,
liquefaction/softening time, leakage, pellicles and
pH.
Small volume parenterals (SVPs) Color, clarity
(for solutions), particulate matter, pH, sterility,
endotoxins.
Large volume parenterals (LVPs)
Color, clarity, particulate matter, pH, sterility,
pyrogen/endotoxin and volume.
Transdermal patches: In vitro release rates,
leakage, level of microbial contamination/sterility,
peel and adhesive forces.
54. For long-term studies, the frequency of
testing should be sufficient to establish the
stability profile of the API
For APIs with a proposed retest period or
shelf life of at least 12 months, the
frequency of testing at the long-term
storage condition should normally be every
three months over the first year, every six
months over the second year, and annually
thereafter throughout the proposed retest
period or shelf life.
55. In general, an API should be evaluated under storage conditions
(with appropriate tolerances) that test its thermal stability and, if
applicable, its sensitivity to moisture. The storage conditions and
the lengths of studies chosen should be sufficient to cover storage
and shipment
Study Storage condition Minimum time period
covered by data at
submission
Long-term • 25 °C ± 2 °C/60% RH ±
5% RH or
• 30 °C ± 2 °C/65% RH ±
5% RH or
• 30 °C ± 2 °C/75% RH ±
5% RH
12 months or 6 months
Intermediate • 30 °C ± 2 °C/65% RH ±
5% RH
6 months
Accelerated • 40 °C ± 2 °C/75% RH ±
5% RH
6 months
56. Active pharmaceutical ingredients intended for storage in a freezer
Drug substances intended for storage in a refrigerator
Study Storage conditions Minimum time period
covered by data at
submission
Long term −20 °C ± 5 °C 12 months or 6 months
Study Storage conditions Minimum time period
covered by data at
submission
Long term 5°C ± 3°C 12 months
Accelerated 25°C ± 2°C/60% RH ± 5%
RH
6 months
57. When the available long-term stability data on primary
batches do not cover the proposed retest period or shelf
life granted at the time of approval, a commitment should
be made to continue the stability studies post-approval in
order to firmly establish the retest period or shelf life.
Commitment that can be made
if the submission includes data from stability studies on
three production batches, a commitment should be made
to continue these studies through the proposed retest
period or shelf life
if the submission includes data from stability studies on
fewer than three production batches, a commitment
should be made to continue these studies through the
proposed retest period and to place additional production
batches, up to a total of at least three, in long-term
stability studies through the proposed retest period or
shelf life
58. if the submission does not include stability data on
production batches, a commitment should be made
to place the first three production batches on long-
term stability studies through the proposed retest
period or shelf life.
The stability protocol used for long-term studies for
the stability commitment should be the same as that
for the primary batches, unless otherwise
scientifically justified.
59. A storage statement should be
established for display on the label
based on the stability evaluation of the
API. Where applicable, specific
instructions should be provided,
particularly for APIs that cannot tolerate
freezing or excursions in temperature.
Terms such as “ambient conditions” or
“room temperature” should be avoided.
60. The purpose of the ongoing stability Program is
to monitor the API and to determine that the API
remains, and can be expected to remain, within
specifications under the storage conditions
indicated on the label, within the retest period or
shelf life in all future batches. The ongoing stability
program should be described in a written protocol
and the results presented in a formal report that
should be available on site.
61. The purpose of a stability study is to establish data , based
on testing a minimum of three batches of the drug substance
or product, a retest period or shelf life and label storage
instructions applicable to all future batches manufactured
and packaged under similar circumstances.
The degree of variability of individual batches affects the
confidence that a future production batch will remain within
acceptance criteria throughout its retest period or shelf life.
Decision Tree for Data Evaluation for Retest Period or
Shelf Life Estimation for Drug Substances or Products
(excluding Frozen Products)