What symptom may indicate a potential methanol poisoning?

• A. Headaches and dizziness
• B. Nausea and vomiting
• C. Visual disturbances such as blurred vision
• D. Abdominal cramps and diarrhea

Answer: (C)

Visual disturbances, such as blurred vision, are particularly indicative of potential methanol poisoning. Methanol metabolizes in the body to formaldehyde and formic acid, both of which are toxic and can affect the optic nerve, leading to visual impairment. The characteristic symptom of visual disturbances in methanol poisoning can range from mild blurriness to complete blindness, depending on the severity of the poisoning and the amount of methanol ingested.

Other symptoms, like headaches and dizziness, nausea and vomiting, and abdominal cramps and diarrhea, can occur with various types of poisonings but are not as specifically associated with methanol as visual disturbances are. While they could potentially indicate other toxic exposures or conditions, the presence of visual disturbances strongly points towards methanol given its unique physiological effects.