A medical device that includes at least one antibiotic in a macromolecular substance that swells upon contact with a solvent. Also, a method for preparing an antibiotic-containing medical device that involves contacting a medical device having at least a portion of the surface formed from a swellable macromolecular substance, with a solvent that swells the macromolecular substance, contacting the swollen macromolecular substance with at least one antibiotic, and removing the solvent from the swollen macromolecular substance.
