What should you know about hyperadrenergic orthostatic hypotension?

When you stand, blood temporarily shifts toward the legs. The nervous system normally adjusts circulation to maintain blood flow to the brain. With orthostatic hypotension, that adjustment is insufficient, and the adrenergic response may produce a racing or forceful heartbeat, tremor, sweating, anxiety-like sensations, or a feeling of internal alarm. Dizziness, blurred vision, weakness, or near-fainting may follow. Several health conditions and medicines can contribute.

Rise in stages: sit first, move your feet, then stand while holding a stable surface. If symptoms begin, sit or lie down promptly and avoid driving until the pattern is understood. Keep hydrated unless a clinician has restricted fluids, and note posture, meals, heat, exertion, medicines, heartbeat sensations, and recovery time. A GP Consultation can check lying and standing measurements and review possible causes.

Seek urgent help for fainting with injury, chest pain, severe breathlessness, a new irregular heartbeat, confusion, one-sided weakness, or symptoms that do not settle after lying down. Arrange prompt assessment for repeated near-fainting, falls, worsening exercise intolerance, or a new problem after starting or changing a medicine. Do not alter prescribed treatment without advice.

Could a medicine, dehydration, anaemia, or heart rhythm problem be contributing? Should I record pulse and blood pressure in different positions? Which fluids, activity changes, or compression measures are suitable for me?