Opioid Info: Natural (known as opiates Morphine Codeine Semi-Synthetic (known as opioids Heroin Hydrocodone (Hycodan) Hydromorphone (Dilaudid) Meperidine (Demerol) Oxycodone (Percodan) Synthetic (also known as opioids Fentanyl (Sublimaze) Methadone (Dolophine) Propoxyphene (Darvon) Pentazocine...