Drug delivery devices and methods

A drug delivery device for insertion into the body of a patient, the device comprising: a drug reservoir portion which comprises a drug reservoir lumen bounded by reservoir walls which comprise a water permeable polymeric material; and a drug formulation which comprises a drug and which substantially fills the drug reservoir lumen, wherein the drug reservoir lumen has a ribbon shape such that a substantial portion of the drug formulation is adjacent to the reservoir wall to facilitate diffusion of the drug through the reservoir walls, and wherein the device is elastically deformable between a first shape suited for insertion through a lumen into a body cavity of the patient and a second shape suited to retain the device within the body cavity.