The use of information and communication technologies in the healthcare industry has been proven to improve patient care, enhance service quality, and increase productivity. Several medical institutions in the Philippines are still employing the traditional method of producing and managing important documents such as medication reports. This study evaluated the current charged medication report system of a general hospital in the country through causal analysis tools. Results showed that actions like pharmacists manually writing information and transporting the reports to another department were prone to errors and delays in the entire process. Moreover, a stream analysis revealed that the core problem of inefficient system of producing the report led to deeper problems such as poor document organization and report errors. A medical information system called MedReS was developed using Microsoft Access to produce the medical documents accurately and more efficiently. The proposed system streamlined data entry, information updates, and encoding of receipts. It is also capable of managing the itemized prescriptions of admitted patients, lessen paper usage, accelerate processing time, and improve overall system efficiency and productivity of the hospital. Future researchers may explore on designing an information system that will integrate preorder medications and send notifications to the pharmacist about the placed orders to make the charged medication system more efficient.