ApplicationNo. 517982 filed on 10/25/1974
US Classes:424/473, With porous, perforated, apertured, or sieved layer (e.g., dialyzing layer, microporous layer, etc.)424/469, Discrete particles in supporting matrix424/480, Cellulose or derivative424/481Containing natural gums or resins
ExaminersPrimary: Rose, Shep K.
Attorney, Agent or Firm
AbstractA drug delivery device for the continuous and controlled administration of a predetermined therapeutically effective dosage of eye drug to the eye of a mamallian patient over a prolonged period of time. The device meters the flow of polylactic acid polymer micro-encapsulated eye drug by means of a drug release rate controlling material comprised of an anionic polyvalent metal cation cross-linked polyelectrolyte. The device bioerodes in the biological environment of the patient concurrently with the dispensing or at a point in time after the dispensing of the therapeutically desired amount of drug.