Which of the following is NOT a symptom of carbon monoxide poisoning?

Carbon monoxide poisoning presents a range of symptoms primarily due to the molecule's interference with the body's ability to transport and utilize oxygen. Common symptoms include headache, dizziness, and nausea as they are indicative of cerebral and systemic hypoxia—the main consequence of carbon monoxide binding to hemoglobin.

A rash, however, is not associated with carbon monoxide poisoning. Instead, it is typically linked to other conditions such as allergic reactions, infections, or dermatological disorders. The absence of rash as a symptom in cases of carbon monoxide exposure is crucial for identifying the nature of the poisoning and differentiating it from other medical issues that could present similar symptoms but with additional signs like skin reactions. Recognizing that a rash is not linked to carbon monoxide poisoning can aid medical professionals in quickly pinpointing the cause of a patient’s symptoms, allowing for more effective treatment and intervention.