About Pharmacovigilance
Subject Code
BP805T
Semester
Semester 8
Credits
4 Credits
Pharmacovigilance (BP805T) is the absolute core science of drug safety. It is defined as the science and activities relating to the detection, assessment, understanding, and prevention of Adverse Drug Reactions (ADRs) or any other drug-related problem. This essential subject explores why drugs that pass rigorous clinical trials can still cause rare, fatal side effects when released to the masses. You will master the methods to detect, report, and establish causality for ADRs, learn international medical coding dictionaries (MedDRA), and understand the strict global legal frameworks (ICH guidelines, CIOMS, CDSCO) that govern pharmaceutical safety monitoring.
Key Learning Objectives
- ADR Fundamentals: Understand the history of pharmacovigilance (e.g., the Thalidomide tragedy), define and classify Adverse Drug Reactions (ADRs), and master standard causality assessment scales (like Naranjo’s scale).
- Global Dictionaries: Learn how to strictly standardize global medical data using the Anatomical Therapeutic Chemical (ATC) classification system, ICD codes, and precisely code adverse events using MedDRA and the WHO Drug Dictionary.
- Active vs. Passive Surveillance: Distinguish between passive spontaneous reporting systems and active safety surveillance methods, including specific protocols for monitoring vaccine safety (AEFI).
- ICH & Global Guidelines: Decipher the complex ICH guidelines governing Phase 1-4 safety data generation, specifically understanding Individual Case Safety Reports (ICSR) and Periodic Safety Update Reports (PSUR).
- Specialized Safety: Evaluate how pharmacogenomics dictates drug toxicity, analyze drug safety in highly vulnerable populations (pregnant women, pediatrics, geriatrics), and understand CDSCO’s Schedule Y regulations in India.
Syllabus & Topics Covered
Unit 1: Introduction to Pharmacovigilance & ADRs
- History and development; WHO international drug monitoring programme.
- Pharmacovigilance Program of India (PvPI).
- Adverse Drug Reactions (ADRs): Definition, classification, severity, and preventability.
- Methods in Causality Assessment (establishing a link between drug and ADR).
Unit 2: Coding, Dictionaries & Establishing PV Programs
- ATC classification, Daily Defined Doses (DDD), and INN for drugs.
- Drug Dictionaries: WHO ART, MedDRA, WHO Drug Dictionary, Eudravigilance.
- Specialized Information Resources for ADRs.
- Establishing PV in hospitals, CROs, and National programmes.
Unit 3: Surveillance Methods & Vaccine Safety
- Vaccine Pharmacovigilance and Adverse Events Following Immunization (AEFI).
- Passive Surveillance: Spontaneous reporting and case series.
- Active Surveillance: Sentinel sites and drug event registries.
- Crisis communication in Pharmacovigilance.
Unit 4: Safety Data Generation & ICH Guidelines
- Safety data generation across Preclinical, Clinical, and PMS phases.
- ICH Guidelines: Organization and objectives.
- Individual Case Safety Reports (ICSR) & Periodic Safety Update Reports (PSUR).
- Good Clinical Practice (GCP) constraints in pharmacovigilance.
Unit 5: Pharmacogenomics, Special Populations & CIOMS
- Pharmacogenomics of ADRs (genetics altering PK parameters).
- Safety Evaluation in Special Populations: Pediatrics, Pregnancy, Geriatrics.
- CIOMS Working Groups and forms.
- CDSCO (India): D&C Act, Schedule Y, and global requirement differences.
How to Score High in Pharmacovigilance
- 1
Master the ADR Classifications: For Unit 1, blindly memorize the Rawlins and Thompson classification of ADRs (Type A: Augmented, Type B: Bizarre, Type C: Chronic, etc.). It is the most fundamental concept of the subject.
- 2
Understand MedDRA Hierarchy: In Unit 2, don’t just learn what MedDRA stands for. Understand its 5-level structural hierarchy (SOC -> HLGT -> HLT -> PT -> LLT). This is crucial for corporate PV interviews.
- 3
Differentiate ICSR from PSUR: An ICSR is filed immediately for ONE single severe adverse event. A PSUR is a massive aggregate report filed periodically (e.g., every 6 months) summarizing all safety data globally. Keep these purely distinct.
- 4
Focus on AEFI for Vaccines: Note that ‘Vaccine Pharmacovigilance’ (Unit 3) is treated entirely differently than normal drugs, because vaccines are given to millions of perfectly healthy children. The tolerance for adverse events is effectively zero.
Why it Matters for Career
Pharmacovigilance (often abbreviated as ‘PV’ or ‘PhV’) is currently the largest mass-employer of pharmacy graduates in the corporate IT sector (companies like TCS, Cognizant, IQVIA, and Accenture). Roles include ‘Drug Safety Associate’, ‘Medical Reviewer’, and ‘Aggregate Report Writer’. Mastery of MedDRA coding and causality assessment directly translates to clearing technical interviews for these highly sought-after, desk-based corporate jobs.
Exam Weightage
Exams heavily target the detailed step-by-step process of Causality Assessment (Naranjo scale), the exact structural layout of MedDRA, the differences between active and passive surveillance, and detailed notes on the CIOMS form and the functioning of the PvPI (Pharmacovigilance Programme of India).
Frequently Asked Questions (FAQs)
Why do we need Pharmacovigilance if a drug already passed 3 phases of rigorous Clinical Trials?
Phase 3 clinical trials only test a drug on about 3,000 highly selected, relatively healthy patients over a period of 1 to 2 years. They are excellent at finding common side effects (e.g., headache occurring in 1/10 patients). However, if an Adverse Drug Reaction (ADR) causes fatal liver failure, but is extremely rare (occurring in 1 in 100,000 patients), the clinical trial is mathematically too small to ever detect it. Pharmacovigilance is the continuous Post-Marketing Surveillance required to catch these rare, delayed, or bizarre ADRs once the drug hits millions of real-world patients.
What exactly is ‘Causality Assessment’?
If a patient takes Paracetamol and then immediately suffers a heart attack, did the drug CAUSE the heart attack, or was it just a coincidence? Causality assessment is the strict scientific method (using validated questionnaires and algorithms) used by drug safety scientists to determine the statistical probability that the drug actually precipitated the adverse medical event, grading it as ‘Certain’, ‘Probable’, ‘Possible’, or ‘Unlikely’.
What is an ‘AEFI’ in vaccine safety monitoring?
AEFI stands for ‘Adverse Event Following Immunization’. It is any untoward medical occurrence which follows immunization and which does NOT necessarily have a causal relationship with the usage of the vaccine. It could be a genuine reaction to the vaccine ingredient, an anxiety-cluster fainting response to the needle (Immunization anxiety-related reaction), or a completely coincidental fever that happened to begin on the same day the child got the shot.