Which of the following is a symptom of hyponatremia?

Which of the following is a symptom of hyponatremia?

• A. Nausea/vomiting
• B. Cough
• C. Headache
• D. Dizziness

Answer: (A)

Low sodium levels in the blood throw off osmotic balance, causing water to shift into cells, including brain cells, which can lead to cerebral swelling and a range of symptoms. Nausea and vomiting are among the earliest and most commonly reported signs of hyponatremia, often appearing as the body reacts to brain irritation and altered fluid balance. While headaches and dizziness can also occur, cough is not typically linked to hyponatremia, making nausea/vomiting the most characteristic symptom among the options.

Low sodium levels in the blood throw off osmotic balance, causing water to shift into cells, including brain cells, which can lead to cerebral swelling and a range of symptoms. Nausea and vomiting are among the earliest and most commonly reported signs of hyponatremia, often appearing as the body reacts to brain irritation and altered fluid balance. While headaches and dizziness can also occur, cough is not typically linked to hyponatremia, making nausea/vomiting the most characteristic symptom among the options.