Conditions: Neoplasms
Keywords: Tapentadol Tumor related pain Opioid Cancer related pain Morphine
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 100
Healthy volunteers: no

Brief summary:
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.

Detailed description:
This is a randomized (study drug assigned by chance), open-label (a medical research study in which participants and researchers are told which treatments the participants are receiving, "unblinded"), parallel-arm (participants receive 1 of 2 possible interventions during the same time frame throughout the study), optimal dose-titration, multicenter (when more than one hospital or medical school team work on a medical research study) study evaluating the conversion rate based on the number of participants achieving pain control and safety within 1 week after switching from an ongoing around-the-clock opioid analgesic (morphine sustained-release \[SR\], oxycodone controlled-release, or fentanyl transdermal) to tapentadol ER or morphine SR, for their moderate to severe chronic, malignant tumor-related cancer pain. The study consists of 2 periods: 1 to 2 week screening period, followed by 8-week open-label treatment period. During the study period, participants will be hospitalized or outpatient. However, it is preferable to be hospitalized 1 week before and 1 week after to evaluate efficacy before and after switching opioids for securing participants' safety. At Day 1, participants will receive either tapentadol ER or morphine SR twice daily. During the treatment period, the dose of the study drug will be titrated to the participant's optimal dose. The participants will receive either tapentadol ER or morphine SR twice daily for 8 weeks. The maximum dose allowed for tapentadol ER will be 500 milligram (mg) daily or morphine SR 140 mg daily throughout the study. Efficacy is primarily evaluated using pain intensity score on an 11 point Numerical Rating Scale (an 11-point NRS is used to measure the pain level where 0=no pain to 10=pain as bad as you can imagine). Participants' safety will also be monitored.

Arms:
arm 1: Tapentadol extended-release (ER) (JNS024ER) oral tablets 100 to 400 milligram (mg) daily for 8 weeks (maximum dose could be up to 500 mg daily), as per Investigator's discretion. arm 2: Morphine sustained-release (SR) oral tablets 30 to 120 mg daily for 8 weeks (maximum dose could be up to 140 mg daily), as per Investigator's discretion.

Interventions: intervention 1: Tapentadol ER intervention 2: Morphine SR
Intervention descriptions: intervention 1: Tapentadol ER 100 to 400 milligram (mg) orally daily for 8 weeks (maximum up to 500 mg daily), as per Investigator's discretion. intervention 2: Morphine SR 30 to 120 mg orally daily for 8 weeks (maximum up to 140 mg daily), as per Investigator's discretion.

Protocol document: