1.	Phase IV Randomized Pilot Study of Oxycodone Hydrochloride Versus Standard Three-Step Analgesic Therapy in Patients With Cancer-Related Pain Phase: Phase IV Type: Supportive care Status: Closed Age: 18 and over Sponsor: Other, Pharmaceutical / Industry Protocol IDs: CRUK-ON/2003/1772, EU-20640, EUDRACT-2004-004235-66, NAPP-CRUK-ON/2003/1772, NCT00378937
2.	Effect of Garlic Supplements on Opioids in Healthy Volunteers Phase: Phase IV Type: Biomarker/Laboratory analysis, Natural history/Epidemiology Status: Completed Age: 21 to 45 Sponsor: NCI, Other Protocol IDs: 2040.00, IR-6130, CDR0000551927, FHCRC-2040.00, FHCRC-2040.00p, NCT00499460
3.	A Safety and Efficacy Study of OROS Hydromorphone HCL in Patients With Cancer-related Pain Phase: Phase III Type: Supportive care Status: Completed Age: 18 to 70 Sponsor: Pharmaceutical / Industry Protocol IDs: CR017437, 42801PAI3009, NCT01205126
4.	A Study Comparing Oxycodone to Oxycodone/Naloxone in Moderate to Severe, Chronic Cancer Pain Phase: Phase II Type: Supportive care Status: Completed Age: 18 and over Sponsor: Pharmaceutical / Industry Protocol IDs: OXN2001, 2007-001313-42, NCT00513656
5.	A Study Of Tanezumab as Add-On Therapy to Opioid Medication In Patients With Pain Due To Cancer That Has Spread To Bone Phase: Phase II Type: Supportive care Status: Completed Age: 18 and over Sponsor: Pharmaceutical / Industry Protocol IDs: A4091003, NCT00545129
6.	Oxycodone and Pregabalin for the Treatment of Oncological Neuropathic Pain Phase: Phase II Type: Supportive care Status: Completed Age: 18 and over Sponsor: Other Protocol IDs: NEUROPAIN01, EudraCT Number 2007-005222-69, NCT00637975
7.	Randomized Study of Opioid Rotation to Methadone Versus Opioid Rotation to Sustained-Release Morphine or Oxycodone in Patients Receiving Opioid Analgesics for Cancer Pain Phase: No phase specified Type: Supportive care Status: Completed Age: 18 and over Sponsor: NCI Protocol IDs: MDA-2007-0791, 2007-0791, MDA-05-08-04, 8208, NCT00726830