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.
Examples of clear liquids that are OK to drink during your colonoscopy preparation include: 1  Water. 2  Tea. 3  Coffee, but no creamer, milk, or other dairy or non-dairy milk substitutes.  Ginger 1  ale. Apple juice.  White grape 1  juice. Plain, clear soup 2  broth. Seltzer or sparkling  water.