Which of the following is a common side effect of iodinated contrast media?

Nausea is indeed a common side effect of iodinated contrast media, which are frequently used in various imaging procedures such as CT scans and angiography. When iodinated contrast is administered, it can cause a range of physiological reactions due to the foreign substance entering the body. Nausea occurs because the gastrointestinal tract is sensitive to changes caused by the contrast agents, and this adverse reaction can be a result of the contrast affecting the stomach or by a direct activation of the vomiting center in the brain.

While fatigue, confusion, and hypertension may appear in some patients, these are not as directly correlated with the use of iodinated contrast media. Fatigue can stem from various other factors such as the patient's overall health condition, the effects of radiation exposure during imaging, or anxiety relating to the procedure. Confusion can be associated with other medical conditions or reactions but is less specific to contrast media. Hypertension, while a possible effect of anxiety during procedures, is not a common direct side effect of iodinated contrast agents.