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3 Proven Reasons of Fatigue After CT Scan With Contrast

Patients might suffer Fatigue after CT scan with contrast. The primary reason behind feeling unwell after CT scan is the contrast dye used to perform the test. Many people often complain about flu-like symptoms after a CT scan. MRI and angiograms also use this dye to reveal the hidden mysteries of the human body. Furthermore, serious ailments are diagnosed with the help of a CT scan, or it can help rule out any severe issue.

Contrast dye is a liquid solution. It’s essential to understand how a contrast dye works. Contrast dye itself appears as a dazzling white color, which differentiates it from body tissues. While on the other hand, contrast dye is an altering agent in MRI exams.

The relaxing time of the nuclei is increased or diminished. This will change the picture. Contrast can help to outline specific blood vessels essential in diagnosis. It can likewise show when an expanded progression of blood goes to a particular part of the body. Moreover, it can help to identify any internal bleeding. Let’s get into some detail and find out about different types of contrast media.

Table of Content

What Are The Different Types Of Contrast Media?

Radiology Contrast Agents are the most general kinds. There are two primary types popularly utilized in imaging modalities like X-Ray, CT, and MRI scans:

  • Iodine contrasts are the primary type. Using intravenous catheters (customarily called “IVs”).
  • Non-iodine contrasts like barium-sulfate. Best suited for oral or rectal applications.

Iodine Contrast medium (Intravascular)

This is a radiocontrast agent which contains Iodine. As it is named, it contains Iodine. This helps upgrade the perceivability of vascular frameworks and organs. At the point when iodinated contrast is applied, some pathology like malignancy shows better perceivability.

They are both moderately innocuous and don’t have any adverse effects. Due to this factor, it’s a reliable scan in radiology. Additionally, they have an excellent soluble rate. Few patients might not respond to the dye as expected. So it is essential to discuss with your healthcare professional.

fatigue after ct scan with contrast


This contrast dye is utilized in MRI examinations commonly. It is infused into the body to improve the diagnostic pictures. Hence, the quality is maximized and enhanced.

Contrast agents deliver much better outcomes in recognizing cancers, aggravation, nerves, and veins blood supply around the body.

Is It Possible To Feel Fatigue After CT Scan With Contrast?

This is the most commonly asked question by the patients. You might experience dizziness after CT scan with contrast. In some cases, patients have reported that they are feeling tired and groggy. But medical research has no proof or connection of fatigue and contrast dye. All the dyes mentioned above are relatively safe and have few reported side effects.

But these adverse effects can be a result of their underlying health issues. In many reports, the allergic reactions of contrast dye like color sensitivity responses, hyperthyroidism, and induction of nephropathy with contrast.

Furthermore, the clinical data shows that individuals with Myasthenia gravis have high chances of exacerbating their disease.

Additionally, patients might suffer from anaphylactic shock. Although this happens rarely, there is a possibility.

This can happen after infusions, rectal and oral dye. Your doctor will fulfill premedication protocols after examining your physical state. Patients should halt the regular intake of medications like oral anti-infectives 48 hours earlier.

What Are The Side Effects Of Contrast Dye?

Some adverse effects will generally arise after some time, like fatigue after CT scan with contrast burning sensation after CT scan when the test is complete. It can happen anytime following 15 minutes till 1 or 2 weeks.

Moreover, weird taste in the mouth after CT scan with contrast is common with oral intake. The allergy symptoms of the contrast dye include a warm sensation or discomfort in the throat region. After a while, this feeling will advance towards the pelvic area. You can feel urinary urgency or bladder issues.

In around 5% of patients, there is a possibility that they might experience nausea or vomiting. It can be due to stress and anxiety. Some issues, like fatigue after CT scan with contrast, are considered normal.

Furthermore, some patients report extreme fatigue after a CT scan with contrast. These patients are under observation.

Some people need contrast allergy treatments after the scan. The side effects might be skin allergies, hives, or excessive redness. Therefore, Benadryl and antihistamines can help to mitigate the symptoms.

Hypersensitivity may lead to trouble relaxing. Emergency health care professionals know how to deal with serious side effects. Other symptoms like leg pain after a CT scan with contrast will go away within thirty minutes.

The concentration of Iodine will affect the severity of allergies. Thus, patients would feel very tired after a CT scan with contrast, depending on the dose of contrast used.

Why Is CT Scan Recommended?

CT is frequently the favored method of diagnosing numerous diseases, like liver, lung, and pancreatic tumors. The imaging permits the doctor to confirm the presence and area of cancer, its size, and the amount it has influenced close-by tissue.

Furthermore, an imaging output of the head can give significant data about the mind. For instance, in case there is any malignancy, enlargement of the organ, or cancer. A CT output can uncover cancer in the mid-region. Any expansion or aggravation in neighboring interior organs is easily detectable. Moreover, this scan helps to identify lacerations of the spleen and other organs.

fatigue after ct scan with contrast

As a CT scan distinguishes abnormal tissue, it helps arrange regions for radiotherapy and biopsies, and it can give important information on the bloodstream and other vascular conditions.

CT scan can detect Progression of bone illnesses, bone thickness, and the condition of the patient’s spine at an early stage.

It can likewise give essential information about wounds to a patient’s hands and feet. Indeed, even tiny bones fractured are noticeable, just as their encompassing tissue.

What Is The Procedure of CT Scan?

The patient might have to keep away from food and potentially fluids overnight.

On The Day Of the CT Scan

In many spots, the patient will lift their clothes. Sometimes, a hospital provides the outfit. Try not to wear any jewelry. If the emergency clinic doesn’t give an outfit, the patient should wear baggy garments liberated from metal zippers.

A few patients might need to drink a dye known as contrast dye. Furthermore, there are two more options an enema or the dye in IV form. The dye works for a better view of veins and organs.

Any patient who has a hypersensitivity to contrast dye should tell the specialist ahead of time. A few prescription medications can diminish hypersensitive responses to contrast dye.

As metal meddles with the operations of the CT scanner, the patient should eliminate all adornments and metal fastenings.

During the CT Scan 

The patient should rest on a mechanized assessment table that slides into a donut-shaped CT scanner machine. Much of the time, the patient will lie on their back, looking up. But some of the time, they might have to lie face down or sideways.

The couch will move after the first X-ray picture. Afterward, the machine will take another shot. The patient needs to lie still for the best outcomes.

During the CT scan, everyone aside from the patient will leave the room. A radio will empower two-way correspondence between the radiographer and the patient. If the patient is a youngster, a parent or grown-up may stand or sit close. Yet, they should wear a mask to forestall radiation.

fatigue after ct scan with contrast


To sum up, various ailments require a proper diagnosis, and sometimes taking the patient’s history is not enough.

Your doctor might recommend additional tests to see what’s going on with you. CT scan, MRI, X-ray are the common examples. Most people complain about fatigue after a CT scan with contrast. Although, it is normal and usually goes away within a few minutes.

But it is advised that the patient talks about all the adverse reactions before the scan. Other minor side effects may include feeling cold after CT scan, burning sensation after CT scan, and dizziness after CT scan with contrast.

If you still have some questions. Don’t skip yet and go through the FAQ section below, as these are the most common concerns.


Is it normal to feel tired after a CT scan?

Yes! Feeling tired after a CT scan with contrast is normal. Many patients experience lightheadedness, nausea, and vomiting. Their body may be rejecting the contrast dye.

Why do I feel weird after a CT scan?

A weird feeling after a CT scan is generally due to the contrast dye administered to your body. Sometimes there is an allergic reaction.

What are the side effects of contrast dye after a CT scan?

The chance of side effects is rare. But the following side effects are expected after the CT scan.

  • Feeling cold after CT scan with contrast
  • Feeling dizziness¬†
  • Nausea
  • Vomiting
  • Fatigue after CT scan with contrast

How long do CT contrast side effects last?

The side effects usually last a few minutes or 1 to 2 hours.

What does cancer look like on a CT scan with contrast?

CT scan can help detect tumor size and location of cancer patients. It also helps to find out whether cancer has metastasized or not.

How to flush out CT scan dye?

It is essential that after CT scan, you should drink plenty of water to discharge the scan dye outside the body.

Can a CT scan with contrast make you tired?

Yes! The contrast dye may make you feel tired and sleepy. However, there is no direct correlation.

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