WATER-SOLUBLE DRUG DELIVERY SYSTEM ALLOWING SLOW RELEASE

摘要

The present invention relates to a drug delivery system allowing slow release of the drug. A drug delivery system according to one embodiment of the present invention comprises an ion complex formed from a drug having a negative charge and a compound comprising multivalent cations. Because of the slow release action, the drug delivery system according to the embodiment is advantageous in that it can not only effectively deliver drugs to local affected areas but can also substantially reduce the frequency of drug therapy and in that it can substantially reduce the inconvenience of patients having to frequently attend hospital in order to treat pathologies and the consequent burden of medical expenses for patients.