How Long After CT Scan Can You Eat (And Why)?

Exact Answer: Immediately After CT Scan

One of the specialized X-rays is CT (computed tomography) scan or conjointly called a CAT scan. X-rays are nothing but types of radio waves that are directed upon the body. Scanning Works of CT are almost similar to other X-ray examinations. Absorbing a particular amount of radiation depends on part of the body.

Through scans, cross-sectional pictures or reports of the specific area of the body can be seen. The Number of CT scans does not rely on any of the factors and there is even no recommended limit. Few tests require certain preparations to be done before the scan whereas areas like facial bones, spine, brain, and sinus do not require any sort of preparation.

How Long After CT Scan Can You Eat

How long after the CT scan can you eat?

If once you are done with your CT Scan, there are no sort of limitations on anything. You can eat immediately and continue to do all regular activities without any restrictions. If dye had been used during procedures, drinking of six to seven glasses water is recommended to remove it out of the body, and in few cases, people are monitored for a while to check for any aspect infections or reactions lick rash, swelling, or issues with respiratory.

Generally, it takes nearly 15 to 20 minutes for a CT scan once you are ready with prior requirements and it takes roughly 1 hour for a CT scan with oral contrast. It is important to take care while you are receiving scan IV contrast. In this type of scan, you are prohibited to eat before 4 hours of your scan but still, you are allowed to drink in an unavoidable situation.

Though you will be monitored for a couple of minutes, consulting your respective doctor is one of the best choices, if any kind of pain or swelling is observed once you are done with the procedure as this can be the sign of a different type of reaction.

For a few CT scans such as abdominal CT scans, drinking a good amount of water or any type of oral contrast is recommended as there is a higher chance to visualize the structures of the abdominal area with more clarity. Usual diet plans and physical activities can be resumed unless your consulted doctor advises you differently.

In Summary:

Type of CT ScansDurationTime
Normal15 minutesImmediately
Scan with oral Contrast1 hourAfter 10 minutes

Why it is Not Necessary to Wait After CT Scan?

According to the study, 90% of people who have undergone CT scan has no further effects Once the test is ended, there are no procedures to follow and as no intake is done almost in all types of Ct scan, there is no restriction upon eating drinking. If injection with iodinated contrast is given during the procedure, people generally feel a strange taste and also few sensations of heat which goes down within 2-3 minutes.

In very rare cases, when contrast is given into the vein or back of the hand, people get rashes and other types of allergies. Machines that are used for CT scan make a circle on the body and finally sends the pictures which are absorbed by a technician.

Typically, doctors prefer a CT scan upon MRI as it is quicker than MRI. Additionally, you can get rid of uncomfortableness with small places, by making use of the CT scan rather than MRI. CT scans are always quick and easy compared to other X-ray scans. And with CT scans such as Spiral CT, it is quicker than others. Though the scan results in no pain, remaining still for many minutes may lead to discomfort.

One of the notable side effects is Diarrhea if you have taken the contrast through the mouth. Or else no other extra care is required after CT scans. There may be dramatically a very small chance of developing cancer later in life. The low risk that is taken into account is to be outweighed by the advantages provided by the scan.


Nothing should be eaten for 3 hours before any sort of CT scans. You may still consume clear liquids like coffee, water up to two hours before the Scan. Your doctor might provide you with further or alternate directions after the scan procedure, which normally depends on your explicit situation.

With numerous advantages of CT scan, it also has few risks that are impossible to avoid. Radiation affects older people a little higher when compared with children. Only professionals can reduce the risk of CT scans. This could be avoided till the potential amount.


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