The Water Bolus for POTS: How Fast Drinking Water Raises Blood Pressure
Drinking roughly 500 ml (about two cups) of plain, cool water quickly triggers the osmopressor response: within 5 to 15 minutes it raises blood pressure and can lower standing heart rate by 10 or more beats per minute in people with POTS and orthostatic intolerance. The effect peaks around 20 to 40 minutes and fades within an hour, so it is a fast, free tool to reach for before standing, showering, or getting up in the morning, not a replacement for daily salt, fluids, and the rest of your plan. Test it with a simple before-and-after stand test to see how much it does for you.
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