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.
One day prior to surgery. 1  Your bowel prep begins the day before your surgery. You can have solid foods the day before, but once youâve started the bowel prep you can only have clear liquids. 2  We also recommend that if you do eat solid foods before your prep that you eat lightly. Examples: Toast, yogurt, soup.