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 How much are private abdominal scans? 25/01/2022 Can liver disease be detected on an abdominal ultrasound? 25/01/2022 Can I have coffee before an abdominal ultrasound? 25/01/2022