Global Analgesics Market Assessment, By Drug Class [Opioid, Non-opioid, Compound Medication], By Route of Administration [Oral, Parenteral, Topical, Transdermal, Others], By Application [Musculoskeletal Pain, Dental Pain, Surgical Pain, Cancer Pain, Neuropathic Pain, Others], By Distribution Channel [Hospital Pharmacies, Retail Pharmacies, Online Pharmacies], By Region, Opportunities and Forecast, 2017-2031F