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Doctor insights on: Can You Drink After Having Radioactive Contrast Dye And A Ct Scan

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Dr. Ana Adelstein
1 Doctor shared a insight

Computed Tomography (Definition)

Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! The image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more


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Could a CT scan miss appendicitis if I wasn't given contrast fluid to drink or wasn't injected with dye?

Could a CT scan miss appendicitis if I wasn't given contrast fluid to drink or wasn't injected with dye?

Possibly: That is possible. Contrast should always be given for abdominal and pelvic cts unless there is reduced kidney function or allergies to the dye. ...Read more

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Egd/ct scan -radioactive contrast dye leaked into daughters arm instead of going to her vein, should I be concerned?

Egd/ct scan -radioactive contrast dye leaked into daughters arm instead of going to her vein, should I be concerned?

Radiology: Contrast can cause irritation. Cool compresses a few times a day for a few minutes will help. If stays red, looks infected, or forms a blister see your doctor or go to er. ...Read more

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Can you drink alcohol 24 hours after having a CT scan? I had to drink contrast (not as much given my weight) and had dye injected during the scan.

Can you drink alcohol 24 hours after having a CT scan? I had to drink contrast (not as much given my weight) and had dye injected during the scan.

Yes: Yes, assuming that you are healthy and have normal kidney function you can drink alcohol 24h after a CT scan. The dye should all be eliminated from you body. Just remember that increasing fluid intake (water) decreased the possible harmful effects of contrast on your kidneys. ...Read more

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Gastric sleeve leak. Ct scan, endoscopy, and GI swallow test now shows no leak. When I drink blue dye it shows in jp drain...why.

Gastric sleeve leak. Ct scan, endoscopy, and GI swallow test now shows no leak. When I drink blue dye it shows in jp drain...why.

Leak: Despite the tests, you must still be leaking internally. Not all x-rays see everything & endoscopy will not see a small leak. Contact & see your surgeon ASAP. ...Read more

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Gastric sleeve leak...had CT scan, GI swallow test, and endoscopy and all show no leak. When drink blue dye it shows up on jp drain???? Why

Gastric sleeve leak...had CT scan, GI swallow test, and endoscopy and all show no leak. When drink blue dye it shows up on jp drain???? Why

Limits of studies: All above studies done to detect leak have their limitations and sometime clinical suspicion is the best test!!! Hopefully the leak is small because it did not show on all these tests. Typically situation like this can be managed without need for further operation unless patient is very sick (septic) however surgeon on the case can give the best opinion after evaluating the whole picture. ...Read more

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Isn't it unusual to to get nausea after a CT scan with no contrast dye?

Can happen: If you were asked to swallow a large amount of the dilute barium contrast then that might make you a bit nauseous. Otherwise, no. ...Read more

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What happens if you get an allergic reaction to the contrast dye for CT scan?

What happens if you get an allergic reaction to the contrast dye for CT scan?

See below: With iodinated based contrast you may get allergic reaction ranging from mild skin rash to severe rash, difficult breathing, severe drop in blood pressure and even cardiac arrest. Patients at risk are those with previous reaction, history of asthma or allergy. Please consult with your doctor. ...Read more

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Can a CT scan without contrast dye rule out causes of a secondary cough headache?

CT without contrast: Will show whether there is hydrocephalus ("water on the brain"), fluid collections around the brain, and large mass lesions (tumors). The vast majority of head ct's for headache are normal in patients with headache as their sole symptom and I believe this test is vastly overused in the usa (for a myriad of reasons). ...Read more

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Why didn't I have to drink contrast die before I had my CT scan to check for gallstones?

Why didn't I have to drink contrast die before I had my CT scan to check for gallstones?

Because: It would not add any extra useful information to do so. Oral dye just lights up the intestine....Not gallbladder. ...Read more

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Can a CT scan without contrast dye detect brain tumours?

Can a CT scan without contrast dye detect brain tumours?

Should do it: If a brain tumor is causing significant symptoms, it should surely be large enough to be detected on a cat scan. ...Read more

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What to do if I have to have a CT scan how safe is the contrast dye?

What to do if I have to have a CT scan how safe is the contrast dye?

CT IV contrast: IV contrast is associated with a very low incidence of acute adverse events, and the bulk of these are not life threatening.
Studies report an overall acute adverse reaction rate (allergic-like + physiologic)
of 0.2%-0.7%. Serious acute reactions to IV dye are rare, with an historical rate of approximately 0.04%. FDA review demonstrated a rate of 2.1 fatalities per 1 million injections.
...Read more

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Can doctors tell me what does the CT scan contrast dye taste like?

Various Flavors: The oral ct contrast is a dilute barium suspension which can have different flavors depending on the manufacturer. There could be banana, orange, etc. ...Read more

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Why didn't I have to drink contrast fluod for a CT scan looking for appendicitis?

Why didn't I have to drink contrast fluod for a CT scan looking for appendicitis?

Not needed: Thank you for your question. Most of the time appendicitis can be diagnosed without needing to use any imaging. A ct scan is sometimes used if there is some questions about whether you actually have appendicitis. Contrast has its own risk when consumed (mainly kidney concerns). Doctors try not to give contrast unless absolutely necessary and needed to show specific areas of the body. ...Read more

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Just had a CT scan with contrast dye for my shoulder two day ago, since then I m getting pains on my left and right lower side that comes and goes?

Likely unrelated: Ask your doctor to check your kidney function if you need reassurance. The contrast material used for ct is quite safe but may in rare instances affect the kidneys, more commonly in diabetic patients. Most radiology facilities screen patients prior to the exam to insure the safety of using the contrast media. ...Read more

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Can you be allergy tested for iodine constrast dye before CT scan?

Not aware of testing: The risk of an adverse reaction to non ionic IV contrast dye is very low, less than 1 in 100 injections. Most of the reactions are mild and easily treated. Severe reactions occur in 1-2 per 10, 000 injections of IV non ionic contrast.

If a person was severely allergic to many different things, perhaps a consultation with an allergist could be obtained. ...Read more

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If I've had contrast CTPA scan before with no allergic reaction- what's the chances of me having a reaction with another CT scan with dye?

If I've had contrast CTPA scan before with no allergic reaction- what's the chances of me having a reaction with another CT scan with dye?

Low: Considering your body has been exposed to the contrast with no reaction, it is unlikely the same or similar contrast will bring any reaction. Nonetheless speak with your doctor about your concerns so they can prepare and answer your questions thoroughly. Good luck. ...Read more

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How long does it take for contrast dye from a CT scan to leave your body?

24 hours: In a patient with normal renal function, contrast should be out of your system within 24 hours. ...Read more

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I'm concerned because I have to have a CT scan how safe is the contrast dye?

Very safe: Assuming you are not allergic to the dye and do not have kidney problems, the dye is safe. People with dye allergies often are allergic to shellfish, or have a history of asthma. They will question you before they give you the injection. ...Read more

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I have a CT scan with contrast they told me not to eat or drink 4 hours before. But I forgot and I ate. What will happen?

Likely nothing: The old protocols for a ct scan with contrast stated that there should be nothing by mouth 4 hours prior to the study. The rationale was to prevent vomiting thought to be caused by the intravenous contrast. The contrast agents currently used have very little likelihood of causing vomiting, so most centers will now allow you to drink clear liquids prior to the study. Still best to avoid solids. ...Read more

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How long after CT scan with contrast do I have to wait to drink alcohol?

Not sure: What portion of your body is beaing scanned, but there is no interaction between contrast and alcohol. Therefore, no interval is needed. Perhaps have a drink before to calm down and lie still. ...Read more

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Can CT scan clearly pin point the location of colon perforation and determine the size of the hole, using color contrast drink?

Can CT scan clearly pin point the location of colon perforation and determine the size of the hole, using color contrast drink?

Sometimes: If the perforation is large enough, and the oral contrast is in that loop of bowel, then yes.

A very small hole may not be seen that way, but the ct will show air that has leaked out of the bowel, which can help the surgeons if an open repair is required. ...Read more

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I'm allergic to the contrast dye, but could a CT scan still detect bladder cancer?

I'm allergic to the contrast dye, but could a CT scan still detect bladder cancer?

Maybe: Although ct scans are an excellent radiographic study, they can easily miss small bladder masses. If one should have a very large bladder mass, it will likely be seen. However, a cystoscopy is still required because the mass seen on ct scan does not neccessarily mean cancer. A tissue diagnosis with a biopsy is still required to make the definitive diagnosis. ...Read more

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Will a contrast dye CT scan always show small gallstones in bile ducts?

Will a contrast dye CT scan always show small gallstones in bile ducts?

No: Contrast does not usually enter the bile ducts or gallbladder except under certain unusual circumstances. Gallstones and bile duct stones can often be seen in a non contrast ct scan, but they will also be detected in a carefully performed ultrasound exam. ...Read more

Radioactive (Definition)

Radioactivity refers to the particles which are emitted from nuclei as a result of nuclear instability. Because the nucleus experiences the intense conflict between the two strongest forces in nature, it should not be surprising that there are many nuclear isotopes which are unstable and emit some kind of radiation. The most common types of radiation are called alpha, ...Read more


Dr. Michael Gabor
1,885 Doctors shared insights

Ct Scan (Definition)

Computed tomography (ct scan) or computed axial tomography (cat scan), is a medical imaging procedure that utilizes computer-processed x-rays to produce tomographic images or 'slices' of specific ...Read more