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Evolution of Clinical Research

A historical journey through the milestones, ethical shifts, and scientific breakthroughs that shaped modern clinical trials.

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Evolution of Clinical Research
From early observations to evidence-based medicine
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Evolution of Clinical Research
From early observations to evidence-based medicine
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The scale of modern research
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450,000+Active Global Trials
11%FDA Approval Rate
$2.6 BillionAvg. Development Cost
10-12 YearsPhase I-III Duration
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Key historical milestones
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1

1747: James Lind

First controlled trial for scurvy treatment.

2

1947: Nuremberg Code

Establishment of voluntary informed consent.

3

1964: Helsinki Declaration

Ethical principles for medical research.

4

1996: ICH-GCP

Global harmonization of clinical standards.

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James Lind and the scurvy trial
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    Event: 1747 trial on HMS Salisbury
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    Divided 12 sailors into six groups
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    Tested cider, vinegar, seawater, and citrus
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    Observed rapid recovery in citrus group
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    Outcome: First controlled clinical trial
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    Proved vitamin C prevents scurvy
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    Introduced the concept of comparative groups
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    Reduced naval mortality rates significantly
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The Nuremberg Code
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    Event: Post-WWII Doctors' Trial (1947)
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    Exposed horrific Nazi human experiments
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    Legal proceedings against 23 physicians
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    Focus on lack of patient consent
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    Outcome: Mandatory informed consent
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    Requirement for beneficial research goals
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    Avoidance of unnecessary physical suffering
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    Right of subject to withdraw anytime
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The Declaration of Helsinki
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    Event: WMA adoption in 1964
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    Need for a physician-led ethical code
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    Addressed gaps in the Nuremberg Code
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    Focused on clinical research goals
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    Outcome: Distinction between therapeutic/non-therapeutic
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    Requirement for Institutional Review Boards
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    Standardized reporting of research results
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    Protection of vulnerable populations
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The Tuskegee Syphilis Study
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    Event: 1932-1972 US Public Health Service
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    Study of untreated syphilis in black men
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    Withheld penicillin after it became standard
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    Deceived participants about their treatment
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    Outcome: The Belmont Report (1979)
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    Defined Respect, Beneficence, and Justice
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    Creation of the Office for Human Research
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    Strict federal oversight of human trials
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Impact of GCP on trial quality
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Improvement percentage after ICH-GCP implementation
85
Data Accuracy
92
Patient Safety
78
Regulatory Approval
95
Global Acceptance
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Modern clinical trial workflow
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01

Pre-clinical

In vitro and in vivo safety testing.

02

Phase I

Safety and dosage in small healthy groups.

03

Phase II

Efficacy and side effects in patients.

04

Phase III

Large scale confirmation of benefit.

05

Phase IV

Post-market surveillance and long-term safety.

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The Thalidomide Tragedy
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    Event: 1950s drug for morning sickness
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    Marketed without rigorous fetal testing
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    Caused thousands of phocomelia births
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    Lack of stringent regulatory review
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    Outcome: Kefauver-Harris Amendment (1962)
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    Proof of efficacy required for FDA
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    Mandatory reporting of adverse events
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    Strict control over investigational drugs
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“
The interests of science and society should never take precedence over the well-being of the subject.
Declaration of Helsinki
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Thank you
Questions and Discussion
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