Background: The study assessed the knowledge, attitude, and behaviour of COPD patients as well as the variables that affected the effectiveness of treatment. Aims & Objectives: To study of an effects of clinical pharmacist intervention on knowledge, attitude, and practise of patients with chronic obstructive pulmonary disease (kap). Methods & Materials: In the three-month trial, a total of 26 COPD patients were included. A well created questionnaire was used to examine and record the baseline Knowledge, Attitude, and Practice (KAP) of patients regarding COPD. The initial KAP result indicated that patients had a dim view of their illness. On subsequent follow-up visits, a clinical pharmacist informed patients about COPD and their medications. The KAP was once more given after the conclusion of the investigation. Results: The KAP of the patients improved as a result of patient education, and they were able to satisfactorily respond to the same questions that were posed at baseline. After counselling, the results revealed a sizable improvement in KAP. Conclusion: We reached the conclusion that the clinical pharmacist's health education can improve the course of treatment for COPD patients.