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.
Then the second dose is taken the next day approximately 5 hours before the colonoscopy, followed by at least three 8-ounce drinks of clear liquids. For the day-before regimen, the first dose is taken in the afternoon or early evening before the colonoscopy, followed by five 8-ounce drinks of clear liquids within 5 hours.