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

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Dr. Ronald Krauser
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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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How long after drinking contrast dye for CT scan can they take the images? Thanks ahead of time.

60-90 minutes: Usually about 60 to 90 minutes. May take longer if slow bowel transit.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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).

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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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.

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
1,857 Doctors shared insights

Ct Scan (Definition)

Ct scan uses data from a beam of xrays and reconstructs a cross sectional image of your body. It is a high dose of xrays and used only when the benefits outweigh the risk. Cancer risk is 1 in 500 in children. Also using iodinated contrast might cause transient renal failure in about 5% of patients. (contrast induced nepropathy) most do not explain this to the patient as ...Read more