INject – The Multi-Dose Autoinjector

The Inject Multi-Dose Autoinjector project develops a reusable emergency medication delivery system to address the shortcomings of single-use devices like EpiPens, with particular focus on accessibility for low-and-middle-income populations. This innovative design incorporates multiple pre-loaded doses in a single device, dramatically reducing both plastic waste and long-term costs while maintaining reliability. The autoinjector features an intuitive twist-lock arming mechanism that replaces conventional safety pins, along with automatic needle retraction after each use to prevent contamination and needlestick injuries.

Through extensive user testing, the team optimized the device for intuitive operation with one-handed functionality and clear visual indicators. The mechanical design employs a sophisticated selector rail system and spring-loaded mechanisms to ensure precise dose delivery. By merging sustainable engineering solutions with universal design principles, this multi-dose platform significantly decreases medical waste, improves affordability, and enhances emergency treatment accessibility, representing a major advancement in medical device technology for underserved communities.