a pharmacokinetic and safety study of osmotic release oral system (oros) hydromorphone in non-opioid tolerant chinese participants with cancer

Conditions: Pain

Summary: the purpose of this study is to assess the single dose pharmacokinetic profile (explores what a drug does to the body) and safety of osmotic release oral system (oros) hydromorphone in chinese participants with cancer (abnormal tissue that grows and spreads in the body) who are not opioid (morphine-like medications) tolerant (decrease in response to a fixed dosage of drug over time and higher doses of a drug are needed to get desired effect).

this is an open-label (all people know the identity of the intervention), single-dose study in adult chinese participants with cancer. the study will consist of a screening phase (within 21 to 1 days before admission to the research facility on day -1) followed by a 4-day open-label treatment phase (day -1 to day 3). participants will remain confined to the study center from day -1 until completion of the end-of-study visit or withdrawal assessments, which will be done upon completion of the 48-hour pharmacokinetic sampling on day 3, or upon early withdrawal. the total study duration will be approximately 24 days. all participants will undergo a naloxone challenge test (at a subcutaneous \[under the skin\] dose of 0.8 milligram \[mg\]) for opioid dependency during the screening phase. only those participants who pass this challenge test will be allowed to continue in the study. during the treatment phase, upon completion of a 10-hour overnight fast, participants will receive a single oral (having to do with the mouth) 8 mg dose of hydromorphone in the morning of day 1. serial blood samples will be collected immediately before and through 48 hours after dosing for the determination of plasma hydromorphone concentrations. participants will be administered naltrexone 50 mg, to block the opioid effects of hydromorphone, 14 hours before, 2 hours before, and 10 hours after study drug administration. after the 10-hour dose, additional doses of naltrexone will be administered every 12 hours up to 34 hours postdose. participants' safety will be monitored throughout the study.

Eligibility criteria:
inclusion criteria: * participants diagnosed with early stage cancer, with no active metastases (spread of cancer cells from one part of the body to another), or severe intercurrent systemic disease. no extensive radiotherapy (treatment of cancer using x-rays), systemic biologic or cytotoxic therapy within 4 weeks before the first dose of study drug. immunotherapy (giving of drugs to help the body's immune \[protective\] system; usually used to destroy cancer cells) or hormone therapy with stable dose would still be allowed * participants who are not opioid (morphine-like medications) tolerant: no previous use of an opioid or no use of an opioid within 21 days before the first dose of study drug on day 1 * participants who previously have received opioid medication for pain management will have had their opioid medication discontinued for reasons unrelated to this study * women must be postmenopausal (no spontaneous menses for at least 2 years), surgically sterile, abstinent (not having sexual intercourse), or, if sexually active, be practicing an effective method of birth control before entry, throughout the study and up to 15 days after the end of the study/early withdrawal * men must agree to use an adequate contraception method (example, vasectomy \[surgery to cut out part or all of the ductus deferens to make a man not able to produce children\], double-barrier \[using two forms of effective contraception (example, condom and spermicide)\], partner using effective contraception) and to not donate sperm during the study and for up to 1 month after the end of the study or early withdrawal * signed an informed consent document indicating they understand the purpose of and procedures required for the study and are willing to participate in the study exclusion criteria: * participants with a history of cardiac, nervous system or respiratory disease which in the investigator's judgment precluded participation in the study because of the potential for respiratory depression * participants with gastrointestinal disease of sufficient severity (very serious, life threatening) to be likely to interfere with oral analgesia (drug used to control pain) including: dysphagia (trouble swallowing), vomiting, no bowel (the intestine) movement or bowel obstruction (block, blockage) due to impaction within 5 days of the study, severe gut narrowing that may affect the absorption (the way a drug or other substance enters the body) of orally administered drugs, particularly the insoluble hydromorphone outer coating * participants who are unable to swallow solid, oral dosage forms whole with the aid of water * use of monoamine oxidase inhibitors (mao-i) within 21 days before the first dose of study drug on day 1 * use of opioids within 21 days before the first dose of study drug on day 1

Keywords: pain hydromorphone oros