what causes hyponatremia signs and symptoms?
['Certain medications. ... ', 'Heart, kidney and liver problems. ... ', 'Syndrome of inappropriate anti-diuretic hormone (SIADH). ... ', 'Chronic, severe vomiting or diarrhea and other causes of dehydration. ... ', 'Drinking too much water. ... ', 'Hormonal changes. ... ', 'The recreational drug Ecstasy.']