Global Over-the-Counter (OTC) Analgesics Market Assessment, By Drug Type [Acetaminophen, Nonsteroidal Anti-inflammatory Drugs (NSAIDs), Salicylates, Other Analgesics], By Route of Administration [Oral, Parenteral, Topical], By Distribution Channel [Hospital Pharmacies, Retail Pharmacies, Online Pharmacies, Others], By Region, Opportunities and Forecast, 2017-2031F