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.
Save. When having a colonoscopy, you typically need to stop eating solid foods one day before the procedure and follow a clear liquid diet. Exactly what's allowed on this diet can vary slightly from hospital to hospital, however, so check with your doctor when you schedule your procedure.lear liquids can have some color to them, but many hospitals request you avoid those that contain orange, red or purple coloring. Only see-through liquids are allowed. Dairy products, nondairy creamers and alcohol are not. Also on the list of drinks to avoid are vegetable juice, orange juice and grapefruit juice.