Examples include heroin, hydrocodone, and hydromorphone. Fully synthetic opioids are not derived from an opiate but still bind the opioid receptor. Examples include fentanyl and methadone [2]. Opioids are often used medically for pain relief but are also used non-medically for their psychoactive and euphoric effects.
A clear liquid diet on the day before your colonoscopy helps clear out your intestines, as well as helping to maintain your hydration.
On the day of the colonoscopy. Starting 4 hours before your scheduled arrival time, start drinking the remaining half of the prep which you refrigerated overnight. Every 15 minutes, drink eight ounces of the prep until the container is empty. Drink an additional 16 ounces of clear liquids.