Pharmacist traditionally involving compounding, production and dispensing of drugs from ancient times. As the diseases and sedentary life style leads to complications to use of more medications to manage the disease and life style problems, this is the time to identify the unsafe and irrationalize medicine medical therapy has emerged. This has also contributed to clinical pharmacists being more involved in patient-centered pharmacotherapy. A large literature documents the multiple roles clinical pharmacists can play in a variety of health care settings. The main aim of the study is role of clinical pharmacist in modifying disease outcome by patient centered care in the medical wards.Clinical pharmacist role between physician and patient to provide drug information, economic benefits, patient compliance, drug related problems (DRP), to determine the effect of patient counseling on quality of life of patient. METHODOLOGY- The prospective observational study to conducts for a period of two and half years about 30 months in patient departments in a tertiary care hospital in South India. promoting better medication use, ensuring that patients receive appropriate pharmacotherapy, thus minimizing the risk of unfavorable outcomes of pharmacotherapy adherence scale. RESULTS & DISCUSSION- A total of 1263 patients out of 6548 inpatients of general medicine department were followed out of which having one or more drug related problems. Female (56.7%) [Table-22] predominance was noted over males (43.3%). Drug related problems were more commonly seen in patients aged between 41-60 years, (47.92 %). A total of 240 drug related problems were identified. Most of the DRP observed in the study resulted from the inappropriate drug dosing problems (25.42%) followed by drug selection (24.16%)[Table-23]. Majority of the clinical pharmacist recommendations were on drug discontinuation (29.58%) and drug doses change (22.6%). CONCLUSION- The study concludes that involving clinical pharmacist services in patients care can significantly helps to identify, resolve and prevent the DRPs in the hospital thereby enhancing the patient’s outcomes. Furthermore, the suggestions provided by the clinical pharmacist during the intervention were well accepted by the physician thus the collaborative approach of physician and clinical pharmacist can provide better patients centre care outcomes. The study stresses the importance of clinical pharmacist in health care sector and impeccable role in patients care.