A Safety and Efficacy Study of Oral Tapentadol Extended-Release in Japanese Participants

The purpose of this study is to evaluate the conversion rate based on the number of participants achieving pain control and safety within 1 week after switching the opioid (morphine-like medications) analgesics (drug used to control pain), when tapentadol extended-release (ER) (JNS024ER) is orally administered to participants treated with around-the-clock opioid analgesics, for their moderate to severe (very serious, life threatening) chronic (lasting a long time) malignant (cancerous) tumor-related (a mass in a specific area) cancer (abnormal tissue that grows and spreads in the body) pain.