Orthostatic hypotension is a drop in blood pressure when standing up from a sitting or lying position. With aging, the body may be less able to quickly compensate for such drops in blood pressure. Medications and dehydration can contribute. For mild cases, adjusting medications, drinking enough water, and rising slowly can solve the problem. If it ever leads to loss of consciousness or a fall, it can be dangerous. In severe cases, medication may be necessary.
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