Parallel Assessment of Chemotherapy Adherence and Supportive Therapy Adherence on Occurrence and Minimization of Adverse Drug Reactions Among Cancer Patients: A Clinical-Based Observational Study

Abstract

Background: Cancer is a disease that is inevitably treated using chemotherapy, but the cytotoxic drugs used in the treatment have the potency to cause adverse drug reactions (ADRs). Thus, supportive therapy plays an essential role in managing the untoward effects of the cancer drugs in patients. This highlights the importance of medication adherence in managing the disease, mitigating and preventing the occurrence of chemotherapy-induced ADR without compromising the health status of the cancer population. Objective: To assess the adherence to chemotherapy and supportive therapy and to evaluate type and degree of causality of ADRs observed in cancer patients. Methods: On ethics committee approval, a 6-month observational study was conducted among recruited cancer patients undergoing chemotherapy in a tertiary care hospital. Morisky Medication Adherence Measurement Scale–8 was employed to assess the medication adherence, and ADR causality was determined using Naranjo ADR Probability Scale. Results: Ninety cancer patients participated in the study, out of which females were 61.11%. Chemotherapy adherence in comparison to supportive drugs was observed to be more (21.11%). Twelve different combination of ADR were reported in the subjects with variability in the degree of causality assessment. Conclusion and Relevance: The distinction of adherence to the medication used in cancer management with marked level of ADR was well depicted in the study, implicating the necessity of prudent symbiotic practice of an oncology pharmacist, patient, and physician relationship in optimizing the quality of life of cancer patients by imparting vigilant efforts in medication adherence.