Background In the realm of oncology care, patients undergoing invasive procedures are particularly vulnerable to infections due to their compromised immune systems. Antibiotics play a pivotal role in preventing such infections. However, inappropriate or missed administration of peri-procedure antibiotics poses a significant risk in the form of treatment complications, contributing to antibiotic resistanceand increased healthcare costs. Methods The study was a two-cycle, closed-loop quality improvement project utilizing both retrospective and prospective data analysis of peri-procedure antibiotics prescription in a regional oncology centre. Two audit cycles were carried out in total; the first cycle was carried out in November 2023 where six-week data were collected retrospectively. As a result, formal and informal teaching sessions about the importance of correct peri-procedure antibiotics and the availability of complete institutional peri-procedure antibiotics guidelines in clinical areas were ensured. The second cycle was carried out prospectively for two weeks in January 2024. Patients were included if they underwent selected procedures performed by interventional radiology or gastroenterology while the patients operated on by the general surgeons and any day case procedures were excluded. Results We identified a total of 82 interventional procedures during the first cycle that fulfilled the inclusion criteria. Six out of 82 patients (7.3%) did not receive the correct peri-procedural antibiotics as per hospital antibiotics guidelines. A prospective two-week data after implementing the change revealed that 25 patients had documented interventional procedures done during this period using electronic patient records. Out of 25 patients, only one patient (4%) did not receive the peri-procedural antibiotics as per guidelines. We were able to demonstrate increased adherence to the peri-procedural guidelines (from 93% to 96%) during the two cycles. However, this change was not statistically significant (p = 0.50). Conclusion By educating and engaging healthcare professionals in adhering to evidence-based guidelines and best practices, we have observed notable, although statistically significant improvement in peri-procedure antibiotics prescription practices. Continued educational efforts and reinforcement strategies will be vital in further improvements over time. By providing ongoing support and resources, healthcare providers can be empowered to consistently make informed decisions regarding peri-procedure antibiotic administration. This commitment to maintaining high standards of antibiotic prescribing practices is expected to result in improved patient outcomes, including reduced rates of surgical site infections and antibiotic resistance. It is imperative to recognize the critical role that accurate peri-procedure antibiotic prescriptions play in patient safety and overall healthcare quality. By fostering a culture of continuous improvement and adherence to established guidelines, we can ensure that patients receive optimal care while minimizing the risks associated with antibiotic overuse or misuse.