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1. Prof. Shaikh Abusufiyan
Assistant Professor,
AIKTC-School of Pharmacy,
New Panvel-410206
Part-01: Drugs Discovery
and Development
Pharma Learning Forever
2. At the end of this e-learning session you are able to…
A. Distinguish different phases of drug
development?
B. Discuss drug discovery process.
Copyright @shaikhabusufiyan2021
3. Drug Discovery: 2 Phase
1. Discovery Phase
Identification of new chemical entity as potential
therapeutic agent
B. Development Phase
Compound is tested for safety and efficacy
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4. Drug Discovery & Development:
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1. Drug
discovery
2. Pre-clinical
development
3. Clinical
development
Regulatory Approval Phase IV
1. Target
Identification
2. Heat & Lead
Identification
3. Lead
optimization
4.Pharmacological
profiling
Study of
1. Toxicology
2. Pharmacokinetics
3. Synthesis scaleup
4. Formulation
Study for safety &
Efficacy in human
volunteers
1. Phase I
2. Phase II
3. Phase III
Submission of data of
review by regulatory
authority
Post-marketing
surveillance
2.5 years (100) | 1.5 years (20) | 5-7 years (10-2) | 1-2 years (1-2) | (1)
5. Drug Discovery to IND
1. Target Identification
& Validation
2. Heat & Lead Identification
3. Lead optimization
4. Pharmacological Profiling
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6. 1.Target Identification and Validation
â—Ź Disease of Interest (medical need)
understand the mechanism of disease and its
progression
Identify a viable therapeutic target (receptors,
enzymes, transport protein)
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8. Continue….
• The limiting factor
- Emergence of unexpected adverse effects
- Cost and complexity of drug discovery
- Increasing regulatory hurdles.
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9. Q&A
Q.1 What is difference between drug discovery and drug
development process?
Q.2 Enlist the stages of drug discovery
Q.3 What is target identification?
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10. 2. Hit Identification
â—Ź Compounds which assumed to response the
assay in a Favorable manner are called “Hits”
â—Ź Each set of hits are tested separately against
the target assay to identify validated hits.
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11. 3. Lead finding
â—Ź 2 Process
– Convert hit to lead (H2L)
– Modify existing compounds.
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12. Start with hits and create lead compounds (Hit-to-Lead, H2L)
â—Ź Synthesize and test analogues of hits to
optimize certain properties:
– biological activity (potency)
– identify target effects
– selectivity (to avoid side effects or toxicity)
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13. â—Ź Use drug design TOOLS:
– To create novel compounds and optimal
compounds
– Computer-aided drug design (CADD)
• Drug design based on medicinal chemistry
experience.
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14. Another Way to Find Leads – Modify Existing Active Compound
5-HT Serotonin
By Yikrazuul - Own work, Public Domain,
https://commons.wikimedia.org/w/index.php?curid=3935884
CYL - Own work, Public Domain, File:Serotonin-2D-skeletal.svg,
https://en.wikipedia.org/wiki/Serotonin#/media/File:Serotonin-
2D-skeletal.svg
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15. Another Way to Find Leads – Modify Existing Active Compound
â—Ź Design structural changes and create compounds to:
– Improve biological activity and selectivity for
the target
– Eliminate side effects
– Improve physicochemical properties
– Improve therapeutic index (TI) (effectiveness vs.
unfavourable side effects)
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16. 4. Lead Optimization
â—Ź Identify optimal compound(s) for preclinical studies with
Favorable parameters:
– synthetic scalability
– in vitro potency and selectivity
– In vivo efficacy in proof of concept and disease
models
– toxicology (dose-ranging toxicology studies in vivo)
– patentability
– In vivo pharmacokinetics (PK: half-life, Cmax, Tmax etc)
– in vitro ADME characterization
– Optimal mode of delivery
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17. Continue….
â—Ź Highly collaborative work with
pharmacology, toxicology, biology,
process chemistry, patent law etc
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18. Reference:
• H.P Rang. M M Dale, J.M Ritter, R.J Flower, G Henderson.
Pharmacology, Seventh Edition. Elsevier Churchill Livengston
Publication. Page no:726-728.
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19. Disclaimer (Images)
• The images used in this presentation are found from different sources all over the
Internet, and are assumed to be in public domain and are displayed under the fair
use principle for education purpose.
Copyright @ Presentation
• The said presentation is copyright under Copyright @shaikhabusufiyan2021
• The presentation is for education purpose only, don’t use the same for any legal
perspective.
22. Prof. Shaikh Abusufiyan
Assistant Professor,
AIKTC-School of Pharmacy,
New Panvel-410206
Part-02: Drugs Discovery
and Development
Pharma Learning Forever
23. At the end of this e-learning session you are able to…
A. Demonstrate the knowledge of pre-clinical
drugs development?
B. Distinguish different phases of clinical trials.
Copyright @shaikhabusufiyan2021
24. Preclinical Developments
• Aim:
• To satisfy all the requirements that have to
be met before a new compound
tested for the first time in humans.
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25. Preclinical Developments
â—Ź Basically it consist of 4 types of study of drug:
1. Safety Pharmacology
â—Ź To ensure drug has NO obvious hazardous
effect
2. Preliminary toxicology
â—Ź Acute oral toxicity tests to determine
MTD
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26. 3. Pharmacokinetic testing:
â—Ź Asses ADME profile, half life
– It will help to decide dosing
frequency
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27. 4. Chemical and Pharmaceutical Feasibility:
â—Ź Is it feasible to prepare drug in large
quantities ?
â—Ź Feasible to purify in large scale ?
â—Ź Is the compound stable in long duration ?
● What’s a optimal/good formulation to
start with ?
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28. â—Ź In preclinical development
– Most of the work done in GLP
environment
â—Ź Once the development is complete
a complete document is prepared for FDA
review
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29. Continue..
â—Ź Primary goal of preclinical
development
to present data to FDA to allow
initiation of the clinical program:
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30. Continue…
– To justify that the compound exhibits -->
pharmacological activity
– To support the product being -->
reasonably safe for initial use in humans
– To justify exposing --> humans to
reasonable risks
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31. Q&A
Q.1 What is aim of pre-clinical development?
Q.2 Enlist 4 types of studies conducted under pre-clinical
development of drugs.
Q.3 What justification need to be given in the review
document submitted to FDA before initiation of clinical trial?
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32. â—Ź Clinical Trial (Clinical study):
– A systematic study of pharmaceutical product on human subjects ---> (Whether
patients or non patient volunteers)-
– In order to discover or verify
â—Ź Clinical, Pharmacological (pharmacodynamics/ pharmacokinetics)
â—Ź And adverse effect with the object of determining their safety and efficacy is
called as clinical trials.
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Phases of Clinical Trials
33. Phase Zero (Phase 0)
â—Ź It is risky and very dangerous to test IND straightway in
patients.
â—Ź Pretrial testing:
done in very small number of people usually fewer than 15
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34. Continue…
â—Ź In vitro (Biological fluids) and In vivo testing is done to study:
– potential activity
– acute toxicity
– or Adverse effects
– This part of clinical trial i.e. pre-trial testing --> termed
as phase zero (Phase 0).
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35. Phase I (Human/ Clinical Pharmacology Trials)
â—Ź Objective:
– To determine:
â—Ź Maximum tolerated dose in human
â—Ź Pharmacodynamic effect
â—Ź Adverse reactions- with their nature and
intensity
â—Ź Pharmacokinetic behaviour of drug
â—Ź Often carried out in healthy adult volunteers
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36. â—Ź No of subjects:
– At least 2 subjects --> should be used on each
dose (20 to 100 volunteers)
â—Ź No of centres:
– One or two centres with all necessary facility
--> to closely observe and monitor the subjects
â—Ź Expertise of investigator:
– Trained in clinical pharmacology
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37. Phase II Exploratory trials
â—Ź Objective:
– To determine
â—Ź Possible therapeutic use
â—Ź Effective dose range
â—Ź Further evaluation of safety and pharmacokinetics.
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38. Phase II Exploratory trials
– No of Patients: 10 to 12 patients at each dose
level
â—Ź 100-500 volunteers
– Limited to 3-4 centres with adequate facilities
to perform the necessary investigations for
efficacy and safety.
– Expertise of clinician:
â—Ź Specialized in concerned therapeutic area
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39. Phase III (Confirmatory trials)
â—Ź Objective: to obtain
– Sufficient evidence about the efficacy and safety of drug in
large number of patients
– done in comparison with a standard drug or placebo
– Expertise of clinicians:
â—Ź Specialized in the concerned therapeutic areas
â—Ź Selection of clinician need approval of the licensing
authority under rule 21 of the Act.
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40. Continue…
– No of Patients: (1000-5000 patients)
â—Ź If drug is already approved/
marketed in other countries-
– at least 100 patients distributed
over 3-4 centres
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41. Phase IV
â—Ź Study perform
– after marketing of the pharmaceutical product
â—Ź It is in the form of:
– Post marketing surveillance (ADR)
– Assessment of
â—Ź therapeutic value
â—Ź Treatment strategies used
â—Ź Safety profile
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42. Phase IV
â—Ź Same scientific and ethical
standards --> as applied in pre-
marketing studies.
â—Ź It is generally done to explore:
– New indications
– New method of administrations
– New combination
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43. Reference:
• H.P Rang. M M Dale, J.M Ritter, R.J Flower, G Henderson. Pharmacology,
Seventh Edition. Elsevier Churchill Livengston Publication. Page no:726-728.
• Dr. S.P. Agarwal. Good Clinical Practice Guidelines. Archived from
https:/
/cdsco.gov.in/opencms/resources/UploadCDSCOWeb/2018/UploadImmu
nization/Clinical.pdf
Copyright @shaikhabusufiyan2021
44. Disclaimer (Images)
• The images used in this presentation are found from different sources all over the
Internet, and are assumed to be in public domain and are displayed under the fair
use principle for education purpose.
Copyright @ Presentation
• The said presentation is copyright under Copyright @shaikhabusufiyan2021
• The presentation is for education purpose only, don’t use the same for any legal
perspective.
47. Prof. Shaikh Abusufiyan
Assistant Professor,
AIKTC-School of Pharmacy,
New Panvel-410206
Part-03: Drugs Discovery
and Development
Pharma Learning Forever
48. At the end of this e-learning session you are able to…
A. Explain history of clinical trials?
B. Discuss its ethics.
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49. History of Clinical Trials
â—Ź The Nuremberg Code:
– It is a set of research & ethics principles for human
experimentation set
as a result of the Subsequent Nuremberg Trials at the
end of the Second World War.
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50. â—Ź Nuremberg Code was established in 1948,
stating that
– "The voluntary consent of the human
participant is absolutely essential,"
– It makes clear that
â—Ź participants should give consent
â—Ź the benefits of research must outweigh the
risks.
Copyright @shaikhabusufiyan2021
51. History of Clinical Trials...
â—Ź Declaration of Helsinki:
– In 1964 the World Medical Association
established recommendations for biomedical
research involving human participants.
– Issues addressed in the Declaration of Helsinki:
â—Ź Research with humans should be based on
the results from laboratory and animal
experimentation
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52. Continue..
â—Ź Research protocols should be reviewed --> by an
independent committee prior to initiation
â—Ź Informed consent from research participants -->
is necessary
â—Ź Research should be conducted by
--> medically/scientifically qualified individuals
â—Ź Risks should not exceed benefits
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53. History of Clinical Trials...
â—Ź Tuskegee Syphilis Study (1932-1972):
– A research project conducted by the U.S. Public
Health Service
600 low-income African-American males were monitored
for 40 years.
– Proven cure (penicillin) available in the 1950s --> but
still the study continued until 1972 with participants
being denied treatment.
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54. –Many participants died of syphilis during the
study.
–The study was stopped in 1973 only after its
existence was publicized and it became a
political embarrassment.
–In 1997 President Clinton apologized to the
study participants and their families.
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55. Q&A
Q.1 What are two key principles of Nuremberg code?
Q.2 Enlist few guidelines of Declaration of Helsinki.
Q.3 What is Tuskegee Syphilis Study (1932-1972)?
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56. â—Ź The Belmont Report:
– National Commission for the Protection of Human
Subjects of Biomedical and Behavioral Research prepared
the Belmont Report in 1979.
– It summarize the basic ethical principals identified by
the Commission
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57. Ethical Principles
â—Ź Current revision of declaration of Helsinki
â—Ź Ethical principles should respect 3 basic elements
namely:
– Justice
– Respect for person
– Beneficence (To maximize benefits & to
minimize harm & wrongs)
– & Non- maleficence (no harm)
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58. â—Ź Following principles are to be followed:
1. Essentiality
â—Ź Where no alternative is available
â—Ź It is necessary for the:
– Advancement of knowledge
– Benefit of all members of human species
– Ecological and environmental benefit
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59. 2. Voluntariness
â—Ź Inform consent
â—Ź Retain right to stop further
participation
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60. 3. Non- exploitation
– Research subject is to be remunerated
– Fully appraised of all dangers arising in and out of the research
4. Principle of privacy & Confidentiality
– Identity & records --> kept confidential
– should not be disclosed without valid scientific and legal reasons
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61. 5. Precaution and risk minimization
– No irreversible adverse effect
– Generally benefit from the research
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62. 6. Professional competence
– Competent and qualified
– Act with impartiality and total integrity
7. Accountability and transparency
– Experiment conducted in fair, honest and transparent manner
– Full disclosure is to be made to participants
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63. 8. Institutional arrangement
9. Public domain
10. Compliance
– All the guidelines are to be duly
complied.
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64. Reference:
• Dr. S.P. Agarwal. Good Clinical Practice Guidelines. Archived from
https:/
/cdsco.gov.in/opencms/resources/UploadCDSCOWeb/2018/UploadImmu
nization/Clinical.pdf
Copyright @shaikhabusufiyan2021
65. Disclaimer (Images)
• The images used in this presentation are found from different sources all over the
Internet, and are assumed to be in public domain and are displayed under the fair
use principle for education purpose.
Copyright @ Presentation
• The said presentation is copyright under Copyright @shaikhabusufiyan2021
• The presentation is for education purpose only, don’t use the same for any legal
perspective.
68. Prof. Shaikh Abusufiyan
Assistant Professor,
AIKTC-School of Pharmacy,
New Panvel-410206
Part-04: Drugs Discovery
and Development
Pharma Learning Forever
69. At the end of this e-learning session you are able to…
A. Demonstrate the knowledge of pre-clinical
drugs development?
B. Distinguish different phases of clinical trials.
Copyright @shaikhabusufiyan2021
70. USE Of Ethics Committee
â—Ź Sponsor and investigator should seek the opinion
of an independent Ethics committee regarding
suitability of:
– Protocol
– Methods and documents to be used in
â—Ź Recruitment of the subjects
â—Ź Obtaining inform consent
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71. REPSONSIBILITY OF ETHICAL COMMITTEE:
â—Ź Ensure competent review of -->
proposed research protocol prier to
initiation
â—Ź Monitoring for compliance of ethics
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72. REPSONSIBILITY OF ETHICAL COMMITTEE:
â—Ź Its further responsibility is defined as:
– To protect dignity, right & well being --> PARTICIPANTS
– To ensure that universal ethical values and international scientific
standards are expressed
– Development and education of a research community responsible for local
health care requirement.
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73. Composition
â—Ź It should be multi-disciplinary and
multi-sectoral in composition.
â—Ź 2 Hall marks
– Independence
– Competence
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74. â—Ź No of persons:
– Should be kept fairly small
–5 to 7 members (12-15 maximum number
recommended)
– Minimum 5 members are required to form
quorum.
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75. â—Ź Chairperson:
– Not Head of the same institution
– Preferably be from outside the institution
â—Ź Member secretory:
– Belongs to the same institution
– Should conduct the business of the committee
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76. â—ŹOther members:
–Should mix of medical/ non medical,
scientific and non scientific persons.
–Including lay public to reflect the
differed view points.
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77. Q&A
Q.1 What are two key principles of Nuremberg code?
Q.2 Enlist few guidelines of Declaration of Helsinki.
Q.3 What is Tuskegee Syphilis Study (1932-1972)?
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78. COMPOSTION
â—Ź Chairperson
â—Ź 1 to 2 basic medical scientists
(Preferably one pharmacologist)
â—Ź 1 to 2 clinicians from various
institutes
â—Ź One legal expert
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79. COMPOSTION
â—Ź One social scientist/ representative of non
governmental voluntary agency
â—Ź One philosopher
â—Ź One lay person from community
â—Ź Member secretary
â—Ź There should be adequate representation of
– Age, gender and community
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80. Terms of reference
â—Ź Committee member should be made aware of their role and
responsibilities
â—Ź Any change in the regulatory requirement -->
– should be brought to their attention
– They should be kept abreast of all national and international
developments
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81. Continue..
â—Ź It also includes the
– Statement on term of appointment
– Duration of term of membership
– Policy for removal, replacement and resignation
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82. Review procedure
• It should evaluate:
– Possible risk to the subjects with proper
justification
– Expected benefits
– Adequacy of documentation for ensuring privacy,
confidentiality and justice issue.
– It should be done through formal meeting
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83. Submission of application
â—Ź The researcher should submit an appropriate application at least 3 weeks in advanced
â—Ź The protocol should include:
1. Clear research objectives and rational
2. Recent curriculum vitae of the investigator
3. Subject recruitment procedure
4. Inclusion and exclusion criteria
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84. 5. Precise description of methodology of the proposed research
including
– Dosage
– Route of drug administration
– Planned duration of treatment
–Detail of invasive procedure
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85. 6. Description of plan to withdraw or withhold standard therapy
7. Plans for statistical analysis
8. Procedure for obtaining inform consent
9. Safety of proposed intervention including results of relevant laboratory
and animal research.
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86. 10. For research carrying more than minimal risk
– Account of plans to provide medical therapy
11. Proposed composition and reimbursement of
incidental expenses
12. Storage and maintenance of all data ---->
collected during the trial
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87. 13. Plan for publications of results
– Positive and negative
14. A statement on probable ethical issues & steps taken to tackle the
same
15. All other relevant documents
Ex. Regulatory clearance
16. Agreement to comply with national & international GCP
17. Detail of funding agency.
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88. Reference:
• Dr. S.P. Agarwal. Good Clinical Practice Guidelines. Archived from
https:/
/cdsco.gov.in/opencms/resources/UploadCDSCOWeb/2018/UploadImmu
nization/Clinical.pdf
Copyright @shaikhabusufiyan2021
89. Disclaimer (Images)
• The images used in this presentation are found from different sources all over the
Internet, and are assumed to be in public domain and are displayed under the fair
use principle for education purpose.
Copyright @ Presentation
• The said presentation is copyright under Copyright @shaikhabusufiyan2021
• The presentation is for education purpose only, don’t use the same for any legal
perspective.
92. Prof. Shaikh Abusufiyan
Assistant Professor,
AIKTC-School of Pharmacy,
New Panvel-410206
Part-05: Drugs Discovery
and Development
Pharma Learning Forever
93. At the end of this e-learning session you are able to…
A. Discuss decision making process and
interim review of ethical committee?
B. Explain GCP guidelines.
Copyright @shaikhabusufiyan2021
94. Decision Making Process
1. Must be taken in broad consensus
Member secretory --> should communicate
the decision in writing.
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95. Decision Making Process
2. If members have his or her proposal for
review
Then member should not participate when the
project is discussed.
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97. 4. IEC may reverse its positive decisions
In the event of receiving information that may
adversely affect the risk-benefit ratio.
5. Discontinuation of trial should be ordered:
– If goal of trial is already being achieved
– Or it gives unequivocal results
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98. 6. Premature termination:
– Notification with reason for
termination
– Summary of results conducted till
date
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99. 7. The following circumstances require the matter to be
brought to the IEC:
– Amendment to protocol
– Unexpected adverse events
– Any new information that may influence the
conduct of the study
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100. 8. If necessary --> applicant invited to present protocol
9. Subject experts may be invited
– to offer their views
– But should not take part in decision making
– However, Opinion must be recorded
– Minutes of Meeting should be recorded --> which should be
approved and signed by the chairperson.
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101. Interim Review
â—Ź Shall be decided by IEC instead of waiting for
schedule date of meeting
â—Ź This can be done for the following reasons:
– Re-examination of proposal already
examined by the IEC
– Research study of a minor nature
– Urgent proposal of national interest
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102. Record Keeping
â—Ź Record should be maintain for at least a period
of 5 years for the following:
– The composition of IEC
– The curriculum vitae
– SOP
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103. Continue…
– National and international guidelines
– Copies of protocol, data collection formats,
investigational broacher
– All the correspondence with IEC
– Agenda & Minutes of IEC meeting
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104. • Copies of decisions --> communicated
to applicants.
• Record of all notification issued -->
for premature termination of a study
with summary of reasons.
• Final report of the study --> including
microfilm, CDs & video recording.
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105. Q&A
Q.1 In which cases IAEC can discontinue the trial?
Q.2 When interim review is necessary?
Q.3 Enlist few records that is to be maintain for conduct
of trial?
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106. Special consideration
â—Ź Shall be given for research involving:
– Children
– Pregnant and lactating women
– Vulnerable subjects
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107. Good Clinical Practice (GCP)
â—Ź It is an international quality standard provided
by ICH
an international body that defines standards for
clinical trials.
which governments can transpose into regulations.
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108. Continue..
â—Ź THE PRINCIPLES OF ICH GCP:
– Clinical trials should be conducted in
accordance with the ethical principles
– & in consistent with the applicable
regulatory requirement(s).
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109. Continue….
Before a trial is initiated
– Foreseeable risks and inconveniences
should be weighed against the
anticipated benefit
Initiated only if the anticipated
benefits justify the risks.
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110. â—Ź The rights, safety and well-being of the trial subjects --> are the
most important considerations.
â—Ź and should prevail --> over interest of science and society.
â—Ź The available nonclinical and clinical information on an investigational
product --> should be adequate to support the proposed clinical trial.
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111. â—Ź It should be scientifically sound and described in a clear, detailed protocol.
â—Ź Should be conducted in compliance with the protocol that received prior approval
of independent ethics committee (IEC).
â—Ź The medical care given and medical decisions made on behalf of subjects
should always be the responsibility of a qualified physician
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112. â—Ź Each individual involved in conducting a trial --> should be qualified by
education, training and experience
â—Ź Informed consent --> should be obtained from every subject
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113. â—Ź All clinical trial information should be recorded, handled and stored in
a way that
allows its accurate reporting, interpretation and verification
• The confidentiality of records that could identify subjects should be
protected in accordance with the applicable regulatory requirement(s).
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114. • Investigational products should be manufactured,
handled and stored in accordance with GMP.
â—Ź They should be used in accordance with the approved
protocol.
â—Ź The Systems with procedures that assure the quality
of every aspect of the trial should be implemented.
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115. Disclaimer (Images)
• The images used in this presentation are found from different sources all over the
Internet, and are assumed to be in public domain and are displayed under the fair
use principle for education purpose.
Copyright @ Presentation
• The said presentation is copyright under Copyright @shaikhabusufiyan2021
• The presentation is for education purpose only, don’t use the same for any legal
perspective.
116. Reference:
• Dr. S.P. Agarwal. Good Clinical Practice Guidelines. Archived from
https:/
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