What is the definition or description of: propoxyphene overdose?

Propoxyphene OD: Propoxyphene (Darvon) is a narcotic pain reliever. Overdose symptoms could include: either small or dialated pupis, cold /clammy skin, blue lips, sedation, confusion, fainting, weak, slow or irregular pulse & slow, shallow breathing or resiratory arrest. The FDA banned Darvon & other medications that contain propoxyphene due to potential cardiac problems.