The article contains sections titled:
1.
Opioids
1.1.
Opioids in Clinical Use
1.1.1.
Morphine and Morphinane Derivatives
1.1.2.
Piperidine Derivatives
1.1.3.
Fentanyl and Congeners
1.1.4.
Methadone and Congeners
1.2.
Other Structures
1.2.1.
Mixed Opioid Agonist‐Antagonists and Partial Agonists
1.2.2.
Opioid Antagonists
2.
Anti‐Neuropathic Analgesics and Other Nonopioid Compounds
2.1.
Neuropathic Pain Treatment
2.2.
Individual Compounds