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.
The day of the colonoscopy: Clear fluids from the list above. If you are having a colonoscopy only you can drink. clear fluids up until 2 hours before your appointment time. If you are having a. gastroscopy prior to the colonoscopy then nothing to drink for 6 hours prior to the. appointment time.