An analysis of adverse drug reactions in extremes of age group at tertiary care teaching hospital

Objectives: To analyze clinical spectrum, seriousness, outcome, causality, severity and preventability of ADRs in geriatrics and pediatric patients. Materials and Methods: All ADRs reported in geriatrics (≥ 65 years) and pediatrics (≤ 12 years) indoor as well outdoor patients from January, 2010 to April, 2016 at ADR monitoring centre, Department of Pharmacology, B. J. Medical College and Civil Hospital were identified. A retrospective analysis was carried out for clinical presentation, causality (as per WHO-UMC scale and Naranjo's algorithm), severity (Hatwig and Seigel scale) and preventability (Schaumock and Thornton criteria). Results: Out of 3690 ADRs, 160 were in geriatric patients (4.33%) while 231 in pediatric patients (6.26%). The most commonly affected body system was gastrointestinal (53, 33.13%) followed by neurological disorders (26, 16.25%) in geriatric patients. While in pediatric patients, the most commonly affected body system was skin and appendages (73, 31.60 %) followed by gastrointestinal disorders (58, 25.11%). The most common causal drugs in geriatric patients was cardiovascular (38, 23.75%) followed by antimicrobials (28, 13.25%). While in pediatric patients, the most common causal drug group was antimicrobials (85, 33.46%) followed by blood products (36, 14.12%). Total 17 ADRs reported following vaccination, 7 (41.17%) were injection site abscess and 11 (64.70%) were due to pentavalent vaccine. Polypharmacy was common in geriatrics (31, 19.37%). Causality assessment for majority of ADRs in geriatrics (83, 52.5%) and pediatrics (171, 67.32%) were probable. Conclusion: ADRs are common in geriatric and pediatric patients usually within four weeks of oral therapy. Active surveillance of drug safety monitoring in these vulnerable population is recommended.