North America Synthetic Opioids Market, By Product Type (Synthetic Opioids (Methadone, Fentanyl, and Meperidine), and Semi Synthetic Opioids (Hydrocodane, Oxymorphone, Oxycodone, Hydromorphone, and Buprenorphine)), By Application (Pain Management and De-Addiction), By Distribution Channel (Retail Outlets and Hospitals), and By Country (U.S. and Canada)-