Pain Management Drugs Market Size, Share & Industry Analysis, By Drug Class (Opioids, Nonsteroidal Anti-inflammatory, Local Anesthetics, Anticonvulsants, Antidepressants, Anti-migraine, Non-opioid/Non-narcotic Analgesics, Muscle Relaxants), By Pain Type (Acute Pain & Chronic Pain), By Drug Type (Prescription & OTC), By Disease Indication (Neuropathic Pain, Cancer Pain, Post-operative Pain), By Route of Administration (Oral, Injectable/Parenteral, Transdermal, Topical), By Age Group (Pediatric & Adults), By Type (Branded & Generic), By Distribution Channel and Regional Forecast, 2026-2034