Over-the-Counter Pain Medication Market Size and Forecasts (2021 - 2031), Global and Regional Share, Trends, and Growth Opportunity Analysis Report Coverage: By Drug Type (Acetaminophen, and Nonsteroidal Anti-inflammatory Drugs (NSAIDs)); Route of Administration (Oral, Topical, and Parenteral); Distribution Channel (Hospital Pharmacies, Retail Pharmacies, E-commerce, and Home Care), and Geography (North America, Europe, Asia Pacific, and South and Central America)