OBJECTIVES: To estimate the improper medication use among the aged hospitalized patients in Bahria town, Lahore, Punjab, Pakistan. METHODS: An explanatory, non-experimental, cross-sectional study was accomplished from December 2016 to March 2017 in five health-care hospitals of the Lahore, Punjab province of Pakistan. The population under study was patients aged ≥60 years and being hospitalized in the selected health-care hospitals. In this study, data was collected from 500 aged patients (100 patients per hospital). All medicines prescribed in each in-patient chart were noted on a pre-designed Performa and were estimated according to the 2015 American Geriatrics Society Beers Criteria. Statistical Package for Social Sciences (SPSS) was used to analyze the data. RESULTS: In 500 hospitalized in-patient (male 52.7% and female 47.3%) charts, 3,179 medicines were prescribed. The most usually prescribed drug classes were: alimentary tract and metabolism 80%, nervous system 66.3%, anti-infectives for systemic use 62.2% and cardiovascular system 48.3%. The most usually prescribed improper medications were: omeprazole 51.3%, metoclopramide 14.3%, aspirin 9%, diphenhydramine 7.7%, ibuprofen 4%, famotidine 3.3% and chlorpheniramine 1.8%. CONCLUSIONS: The rational use of medicines is of greatest importance, most particularly in the aged population. It is highly recommended that more thoughts should be given to the aged patients.