Incidence and Cost of Chemotherapy-Induced Adverse Drug Reactions Among Cancer Patients in a Charitable Hospital

Introduction: Chemotherapy-induced adverse drug reactions (ADRs) are one of the major consequences of cancer therapy that affects patients’ quality of life, outcomes of the treatment, morbidity, and mortality and increases the economic burden. The study’s objective was to evaluate the incidence, causality, severity, and preventability and to calculate the direct medical cost of chemotherapy-induced ADRs among cancer patients. 
Materials and Methods: A prospective observational study was conducted for 8 months in patients above 18 years and receiving chemotherapy. ADRs were evaluated for their causality, severity, and preventability using different ADR assessment scales, and the economic burden for different ADRs was based on their direct medical costs. 
Results: A total number of 230 patients were enrolled in the study, out of which 84 patients developed 148 ADRs. Patients who received chemotherapy showed a higher incidence of ADRs in 45–55 years of age group (30.95%), females (69.04%), solid tumors (92.85%), stage III (55.95%), and double regimen (61.90%). Paclitaxel and carboplatin were reported to cause most ADRs, such as anemia (14.18%) and leucopenia (6.75%). ADRs were assessed using scales. As per the WHO-UMC scale, 59.4% ADRs were possible, followed by probable (39.2%). The majority of the ADRs were mild (52%) in severity. About 41.9% reactions were probably preventable, and 3.4% were definitely preventable. 
Conclusion: The overall incidence of ADRs was 36.52%. The direct medical cost incurred for the management of ADRs was 457.23 USD.