Gastroscopy Fasting with no food and water for 6-8 hours, no laxatives. Ultrasound gastroscopy Same as gastroscopy with anesthesia appointment if possible. ERCP Same as gastroscopy with sedation with Valium and Dulcolax! Colonoscopy The day before the examination, you should eat a diet with less residue. Drink laxatives 6 hours in advance, no food and water after laxatives. Small colonoscopy Same as colonoscopy Capsule endoscopy Same as colonoscopy Ultrasound colonoscopy Same as colonoscopy with anesthesia appointment if possible. Painless endoscopy = endoscopy + intravenous anesthesia Gastroscopy Colonoscopy ERCP Ultrasound gastroscopy Capsule endoscopy