Substance Use Disorders Affecting Sleep
Opioid Analgesics: Morphine and Other Natural Cogeners
Drug Abuse and Addiction: Pharmacological Phenomena
Opioid Analgesics: Synthetic and Semisynthetic Opioids
Prescription, Nonprescription and Orphan Drugs
Analgesia and Pain Management
You might also read
Articles linked to this work by shared authors, journal, and citation graph.
Updated: Dec 31, 2025

Use of the Operant Orofacial Pain Assessment Device OPAD to Measure Changes in Nociceptive Behavior
Published on: June 10, 2013
John Strang1,2, Nora D Volkow3, Louisa Degenhardt4
1National Addiction Centre, Institute of Psychiatry Psychology & Neuroscience, King's College London, London, UK. john.strang@kcl.ac.uk.
Opioid use disorder (OUD) is a complex brain disorder. Effective treatments like medication and support groups improve recovery, but relapse remains a risk, highlighting the need for continued scientific research.
Area of Science:
Background:
Purpose of the Study:
Main Methods:
Main Results:
Conclusions: