Drug delivery devices and methods

An intravesical drug delivery device, the intravesical drug delivery device comprising:

• a drug reservoir portion which comprises a drug reservoir lumen bounded by reservoir walls which comprise a drug permeable and water permeable elastomeric material;
• and
• a drug formulation in a solid form, 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 walls to facilitate trans-wall diffusion of the drug through the reservoir walls,
• wherein the intravesical drug delivery device is elastically deformable between a first shape, which is a relatively straightened shape configured to be inserted through a patient's urethra, and a second shape, which is configured to retain the intravesical drug delivery device within the patient's bladder, and
• wherein the reservoir walls are dimensioned to define the ribbon-shaped drug reservoir lumen to have a maximum width:maximum height ratio of at least 4:1.