Aspadol is a brand name for tapentadol, a prescription opioid analgesic used to treat moderate to severe pain. Aspadol is available in both immediate-release (IR) and extended-release (ER) formulations. The IR version is used for acute pain relief, such as post-surgical or injury-related pain, and lasts 4-6 hours. The ER version is designed for chronic pain management, providing sustained relief for up to 12 hours, making it suitable for conditions like neuropathy and osteoarthritis.