Global Opioid Analgesics Market Size study, by Drug Class (Morphine, Codeine, Fentanyl, Meperidine, Methadone, Tramadol, Oxycodone, Dextromethorphan, Buprenorphine, Others), By Indication (Surgical Pain, Cancer Pain, Neuropathic Pain, Other), By Route of Administration (Oral, Parenteral, Transdermal, Other), By End User (Hospitals, Retail Pharmacies, Drug Stores, Online Pharmacies) and Regional Forecasts 2021-2027
