May cause side effects

Every drug has side effects. That sounds ridiculously obvious, and perhaps it is. But it bears some thinking about, because it’s more properly expressed as ‘every substance that you put into your body has side effects’. An overdose of water can kill you – not by drowning, but rather by disturbing the blood’s electrolyte balance so much that your cardiac muscles and other organs stop functioning properly. If water has biological toxicity, so does everything.