Can I drink Water before an Abdominal Ultrasound? If you are having an abdominal scan, you are allowed to have clear fluids such as water and black coffee. You Might Also Like What happens after the examination? 25/01/2022 What can an abdominal ultrasound Detect? 25/01/2022 Does gallbladder sludge show up on ultrasound? 25/01/2022