Background: Subtrochanteric fractures pose a challenge for achieving stable fixation in both the young and elderly populations, making it particularly notorious for enabling prompt union and mobility. In this retrospective study, we aimed to analyze the results of proximal femur nailing in the treatment of subtrochanteric fractures. Our focus was on evaluating functional outcomes and radiological union, with a comparative analysis against studies utilizing alternative modalities. Methods: An in-depth retrospective analysis was conducted on 80 patients with subtrochanteric fractures, categorized according to the Sienshiemer classification. The patients underwent surgical intervention using the proximal femoral nail implant. Assessment of clinical outcomes was performed utilizing the Harris hip score.Results: In our study, the average union time was found to be six months, which was notably shorter than the union rates reported in some series utilizing other implants, such as the AO blade plate with a 7.7% union rate. The proximal femoral nail (PFN) demonstrated a conducive environment, enabling early mobility and independence for patients. This not only reduced complications associated with prolonged bed rest but also facilitated a quicker return to work.Conclusion:The findings from our study strongly indicate that the use of the proximal femoral nail (PFN) as an intramedullary implant provides a stable fixation, leading to earlier union when compared to extramedullary implants. Additionally, the PFN approach was associated with lower levels of blood loss and fewer complications, further underscoring its efficacy in the management of subtrochanteric fractures.