US Patent 11185670 Multi-lumen drug delivery devices

Drug delivery devices (700) are provided herein and include an elongated, elastic body (706) extending between a first end and a second end, wherein the elastic body comprises a water permeable wall structure (708) having defining an elongated drug reservoir lumen (714) extending between the first and second ends. One or more secondary lumens (718) are structured (e.g., positioned, sized, shaped, and optionally filled) to be effective to retard or prevent in vivo diffusion of (i) water into the drug reservoir lumen and/or (ii) solubilized drug out of the drug reservoir lumen.