Implantable drug-delivery systems.

  title={Implantable drug-delivery systems.},
  author={Perry J. Blackshear},
  journal={Scientific American},
  volume={241 6},
Implantable drug-delivery systems are being developed to release drugs to the bloodstream continuously as well as free patients from being hospitalized to receive intravenous infusions or frequent injections. One technique is implantation of a pellet in the subcutaneous tissue so the pellet may be released by erosion. Drugs are also diffused through silicone rubber capsules but only polyacrylamide is able to release large molecules. Contraceptive rings containing progesterone and placed in the… CONTINUE READING