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Getting ready for a lower GI series (barium enema): why, the prep, the day of, and after
For anyone who has a lower GI series coming up, the x-ray test also called a barium enema. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK, part of the NIH) says a doctor uses x-rays and a chalky liquid called barium to view your large intestine. This page passes on, by name, what NIDDK says: why doctors use it and what it can show; your health, your medicines, a recent colonoscopy, and pregnancy; the clear liquids and the bowel prep, and why finishing it matters; what happens during the test and how long it takes; and the light stools, the risks, and when to get care right away. It builds the words to say and the questions to ask, and prints a card for the fridge.
Right now
- Trouble breathing, a swollen face, lips or throat, chest pain, fainting, or losing a lot of blood from the anus? Call 911 (ours).
- After a lower GI series: bloody bowel movements or bleeding from the anus, fever, unable to pass gas, severe constipation, or severe pain in your belly? NIDDK says to seek medical care right away.
- The prep is making you sick and you cannot finish it? NIDDK says to call a health care professional. Not sure about a medicine, such as one for diabetes, during the clear liquid days? Ask the doctor who ordered the test; do not stop or change a prescribed medicine on your own (ours).
- It is all too much, or you are thinking of ending your life? Call or text 988, any hour (ours).
More help
- The large intestine, on this site: Getting ready for a colonoscopy · Getting ready for a flexible sigmoidoscopy · Getting ready for a virtual colonoscopy · Colon polyps · Diverticulitis · Bleeding in the digestive tract · Constipation · Getting ready for an upper GI series · An upset stomach: find the right page.
- Getting there and getting ready: Rides to care · My medicines list · Symptom diary · Get ready for your appointment.
- If the news is hard: When the doctor says cancer.
- Care and costs: When you need a doctor and can’t pay · Medical bills.
- In a crisis: Help right now (988, 911). All our free tools.
An upset stomach, and not sure this is the right page? The pages on this site for throwing up, diarrhea, heartburn and constipation, on one list.
This page and its wording were written with AI (Claude) for Scarlet Beast (our AI policy). No doctor or nurse has reviewed it. The facts were read on October 17, 2026 on NIDDK’s Lower GI Series page (NIH), last reviewed in June 2016, and its Spanish version, last reviewed in October 2016; they say the same things (one Spanish line drops a word, “una colonoscopia una biopsia”; the English says “a colonoscopy with a biopsy or polyp removal”, and our Spanish follows it). The cards also point to NIDDK’s Colonoscopy, Diverticular Disease and Colon Polyps pages. The numbers (the last 4 weeks; clear liquids for 1 to 3 days; often a gallon of liquid laxative; 30 to 60 minutes; cramping and bloating in the first hour; light stools for several days) are NIDDK’s. NIDDK gives no x-ray dose and nothing on children for this test, so neither do we. Ours: 911 for trouble breathing, a swollen face, lips or throat, chest pain, fainting, or a lot of blood from the anus; asking ahead which medicines change during the clear liquid days and the prep, above all for diabetes, and never stopping one on your own; mentioning any past reaction to barium or an x-ray dye; writing the start and stop times down; planning the prep evening near a bathroom with the number to call; asking how to flush the barium out and who tells you the results; the card; 988 when it is too much; health centers when money is tight; and the order of the steps. What we left out: barium and bowel-prep brands, laxative names, doses, and clinical pages for providers. This page saves nothing and loads no trackers.