[caption id="attachment_73418" align="aligncenter" width="500"] Unsplash image[/caption] In modern medicine, injectable drug delivery systems have evolved significantly to improve patient experience, safety, and treatment outcomes. Among the most widely used options are autoinjectors and prefilled syringes. Both systems are designed to simplify drug administration, reduce dosing errors, and enhance convenience compared to traditional vial-and-syringe methods. However, they differ in design, usability, cost, and application. Understanding these differences is essential for healthcare providers, pharmaceutical companies, and patients when selecting the most appropriate delivery method.