Background: The present study was designed to assess awareness regarding rational drug therapy and fixed dose combinations (FDC) amongst interns and II MBBS students in a tertiary-care teaching hospital in Maharashtra, India.Methods: This cross-sectional, questionnaire-based study containing MCQ and analytical questions on rational drug therapy, fixed dose combinations and role of Pharmacist in dispensing correct drug to the patients was carried out in both interns (n=80) and II MBBS students (n=100). The completed questionnaires were then collected and analysed statistically for responses.Results: Mean average score obtained by II MBBS students (score - 36.66marks) was significantly better than interns (score- 20marks) which probably may be due to pharmacology teaching they were undergoing. II MBBS students were found to be better informed as compared to the interns (p<0.05) on questions related to rational drug therapy. On the questions related to rationality of FDC in Yes/No type, interns and II MBBS students were found to be equally informed (p>0.05). However, on question related to justification of FDC, interns were found to be better informed as compared to the II MBBS students (p<0.05). On single question pertaining to role of pharmacist, interns were found to be better informed than II MBBS students possibly due to their better understanding of patient-pharmacist relationship.Conclusions: Our study highlights the significance regarding knowledge of rational drug therapy and fixed dose combination (both rational and irrational), both rational and irrational, amongst both interns and II MBBS students while identifying the possible areas of interventions to make them rational clinicians.