Transdermal therapeutic system exhibiting an increased active substance flow and process for the production thereof

US5702721A · kind A · utility

Assignee

• LTS Lohmann Therapie-Systeme GmbH Co. KG · DE

Inventors

• Michael Horstmann · Neuwied, DE
• Fritz Herrmann · Rodgau, DE

Key dates

• Filing date: Aug 30, 1994
• Grant date: Dec 30, 1997
• Expiry date: Aug 30, 2014

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K9/7084
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A transdermal therapeutic system exhibiting layered structure consists of a backing layer which is impermeable to active substances, a matrix having water-insoluble basic material and islands (inclusions) divided therein, and a layer controlling the access of cutaneous liquid by means of which the matrix is activatable. Process for the production are described.