title: Chronic Pain: The Need and Hope for Opioid Alternatives.
mesh_terms: D000701:Analgesics, Opioid / Q000009:adverse effects / Q000627:therapeutic use; D059350:Chronic Pain / Q000188:drug therapy* / Q000473:pathology; D003497:Cyclic N-Oxides / Q000009:adverse effects* / Q000627:therapeutic use; D006801:Humans; D009293:Opioid-Related Disorders / Q000473:pathology*; D011725:Pyridines / Q000009:adverse effects* / Q000627:therapeutic use
chemical_list: D000701:Analgesics, Opioid; C000612073:BIA 10-2474; D003497:Cyclic N-Oxides; D011725:Pyridines