Iontophoretic transdermal delivery device
US6567693B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 15, 2000 |
| Grant date | May 20, 2003 |
| Priority date | — |
| Expiry date | May 16, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N1/30
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A conducting silicone matrix incorporating a suspension of a drug in ionized and non-ionized phases in an emulsion of a hydrophobic polymer. In one version, the drug is prepared as a concentrated aqueous suspension incorporated in a silicone matrix with a silicone surfactant. An electrolyte may be incorporated into the silicone matrix for increasing its conductivity. When a current is applied, the drug in individual globules in the drug suspension migrates away from the electrode and becomes concentrated at the distal side of the globules eventually resulting in an increase in the drug concentration distal to the electrode and adjacent to the skin and thereby resulting in transfer of the active drug through the skin. This system provides a matrix with minimal electroendosmotic flow that is current efficient and provides a drug reservoir that can last for several days during application of the drug.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.