Controlled release oral dosage form

US6156342A · kind A · utility

Assignee

• Andex Pharmaceuticals, Inc. · US

Inventors

• Mongkol Sriwongjanya · Pembroke Pines, US
• Timothy Weng · Dover, US
• Joseph Chou · Coral Springs, US
• Chih-Ming Chen · Taipei, TW

Key dates

• Filing date: May 26, 1998
• Grant date: Dec 5, 2000
• Expiry date: May 26, 2018

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61K9/2846
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A controlled release dosage form for an analgesic that does not contain an expanding polymer and comprising a core containing the analgesic, preferably tramadol or it pharmaceutically acceptable deviates and a semipermeable membrane coating the core.