{"id":"opana-then-placebo-then-darvocet","safety":{"commonSideEffects":[{"rate":null,"effect":"Nausea"},{"rate":null,"effect":"Constipation"},{"rate":null,"effect":"Dizziness"},{"rate":null,"effect":"Drowsiness"},{"rate":null,"effect":"Respiratory depression"}]},"_chembl":null,"_dailymed":null,"mechanism":{"_ai_source":"claude-haiku-4.5","explanation":"Opana (oxymorphone) is a mu-opioid receptor agonist that binds to opioid receptors in the central nervous system to reduce pain perception. Darvocet (propoxyphene/acetaminophen) combines a weak opioid agonist with a non-opioid analgesic. This appears to be a comparative clinical trial rather than a single drug entity.","oneSentence":"This is a study comparing the pain-relief efficacy and safety of oxymorphone (Opana) versus placebo and propoxyphene/acetaminophen (Darvocet) in patients with chronic pain.","_ai_confidence":"medium"},"_scrapedAt":"2026-03-27T23:35:22.686Z","_scrapedBy":"cloudflare-swarm","_wikipedia":null,"indications":{"approved":[{"name":"Chronic pain (study comparison)"}]},"trialDetails":[{"nctId":"NCT00652093","phase":"PHASE4","title":"Lumbar Stenosis Outcomes Research II","status":"TERMINATED","sponsor":"University of Rochester","startDate":"2008-03","conditions":"Lumbar Spinal Stenosis","enrollment":24}],"_emaApprovals":[],"_faersSignals":[],"_approvalHistory":[],"publicationCount":0,"rwe":[],"genericFilers":[],"relatedDrugs":[],"labelChanges":[],"biosimilarFilings":[],"pricing":[],"formularyStatus":[],"manufacturing":[],"companionDiagnostics":[],"competitors":[],"timeline":[],"patents":[],"ownershipHistory":[],"trials":[],"biosimilars":[],"latestUpdates":[],"references":[],"tags":[],"ecosystem":[],"genericManufacturerList":[],"offLabel":[],"developmentCodes":[],"aliases":["opana: oxymorphone HCL","darvocet: propoxyphene/acetaminophen","placebo: inactive drug"],"phase":"marketed","status":"active","brandName":"opana then placebo then darvocet","genericName":"opana then placebo then darvocet","companyName":"University of Rochester","companyId":"university-of-rochester","modality":"Small molecule","firstApprovalDate":"","aiSummary":"This is a study comparing the pain-relief efficacy and safety of oxymorphone (Opana) versus placebo and propoxyphene/acetaminophen (Darvocet) in patients with chronic pain. Used for Chronic pain (study comparison).","enrichmentLevel":3,"visitCount":0,"trialStats":{"total":0,"withResults":0},"verificationStatus":"verified","dataCompleteness":{"mechanism":true,"indications":true,"safety":true,"trials":true,"score":4}}