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.
What to Eat the Day Before Your Colonoscopy. While the change you make to your diet prior to a colonoscopy starts three or four days prior the procedure, on the day before, you need to switch to a clear liquid diet according to the National Digestive Diseases Information Clearinghouse.