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.
Low-Fiber Diet for Colonoscopy Preparation. Three days before your colonoscopy, eat only low-fiber foods listed below. Two days before, continue eating only low-fiber foods. Print this chart (PDF) for easy reference. See the clear liquid chart for the day before, and day of, your colonoscopy. Milk and dairy. OK to eat: Milk.