Adverse Drug Reactions Monitoring in New Patients Admitted to the Cardiac Care Unit in a Tertiary Care Hospital

Background: Adverse Drug Reactions (ADRs) are amongst the commonly occurring event in the intensive care unit where patients are mostly on the polypharmacy. They affect the quality of life of patients and increase the burden on the health care system. Aim and Objectives: The study aimed to estimate the incidence of ADRs and to assess the causality and seriousness of such ADRs by using the Naranjo probability scale. A prospective, observational, longitudinal study was conducted on patients admitted to the cardiac care unit over a period of 10 months. ADRs profile was noted by spontaneous and intensive monitoring. For analysis, descriptive statistics with 95% CI were used. Results: A total of 77 ADRs were reported from the 173 patients, out of which 31 patients suffered from ADRs, with an incidence of 17.9%. The gastrointestinal system was the most common affected system followed by the cardiovascular and respiratory systems. When analyzed on the Naranjo ADR probability scale, the majority of the ADRs (67.5%) were rated as probable followed by possible (32.4%). It was observed that the number of drugs used as well as the duration of stay in the hospital, in patients with ADRs, was significantly higher than those who did not have any adverse effect. The pattern and spectrum of ADRs need to be studied further so that their occurrence can be prevented. Conclusion: The study can be useful in identifying and minimizing preventable ADRs and can be an effort to make the use of drugs more rational and safe.