Postprandial hypotension: what to know

Digestion draws blood towards the stomach and intestines. The body usually adjusts by increasing the heart rate and tightening blood vessels, but that response may be insufficient in some people. Symptoms can be more noticeable after a large meal, with dehydration, or when medicines already lower blood pressure. Dizziness, unsteadiness, blurred vision, nausea, weakness, and fainting can result. A reading taken before and after food can help a clinician identify a pattern, but home measurements should not replace an assessment.

Sit or lie down as soon as symptoms start, and rise slowly once you feel steady. Record the meal, symptoms, timing, blood-pressure readings if available, and medicines taken. Smaller meals, adequate fluids, and a short period of quiet sitting after eating may help some people, but ask a clinician before changing salt intake or prescribed medicines. Arrange a GP Consultation if episodes recur, cause falls, or interfere with daily activities.

Seek emergency help for fainting with chest pain, severe breathlessness, confusion, a serious injury, a new neurological symptom, or a heartbeat that feels very irregular. Urgent review is needed if you remain faint, cannot stand safely, or symptoms occur without eating and are worsening.

Could my medicines or another condition be lowering my pressure? Should I monitor before and after meals? What fluids, meal changes, or treatment options are safe for me?