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Weakness or dizziness is a common symptom of carbon monoxide poisoning because carbon monoxide (CO) is a colorless, odorless gas that interferes with the body's ability to transport oxygen. When inhaled, CO binds to hemoglobin in the blood more effectively than oxygen does, leading to reduced oxygen availability for vital organs and tissues. This deficiency can cause symptoms such as weakness, dizziness, confusion, headache, and fatigue.

Feeling excessively hot, numbness in limbs, or racing thoughts are not typical indicators of carbon monoxide poisoning and are more indicative of other medical issues or environmental factors rather than the specific effects caused by CO exposure.