Reactions such as nausea, vomiting, and headaches when using contrast media are classified as what?

Nausea, vomiting, and headaches associated with the use of contrast media fall into the category of mild reactions. Mild reactions are typically those that do not require any medical intervention and are more common than severe reactions. They can occur due to the body's response to the contrast material but are generally self-limiting and resolve without the need for treatment.

In contrast, severe reactions are more serious and may include symptoms such as anaphylaxis or other life-threatening responses that require immediate medical attention. Moderate reactions may involve symptoms that are more pronounced than mild reactions but not severe enough to require emergency measures. Allergic reactions are a specific type of response that could range in severity, but the symptoms mentioned do not explicitly indicate an allergic mechanism, especially as they are common and not life-threatening.

Therefore, the classification of nausea, vomiting, and headaches as mild reactions is appropriate, acknowledging their common nature and self-limiting progression in many cases.