Patient presents with complaints consistent with postural hypotension, also known as orthostatic hypotension.  Symptoms include dizziness, lightheadedness, blurred vision, and near syncope upon standing or with positional changes.  Onset of symptoms is temporally related to postural change, resolving upon sitting or lying down.  Blood pressure readings demonstrate a significant drop in systolic blood pressure, typically greater than 20 mmHg, andor a drop in diastolic blood pressure greater than 10 mmHg, within three minutes of standing from a supine or sitting position.  Patient denies palpitations or chest pain.  Medical history includes controlled hypertension managed with hydrochlorothiazide.  Current medications reviewed.  Differential diagnosis includes dehydration, anemia, autonomic dysfunction, and medication side effects.  Assessment suggests orthostatic hypotension secondary to medication side effect.  Plan includes advising the patient on lifestyle modifications such as slow positional changes, increased fluid intake, and avoiding prolonged standing.  Medication review and potential adjustment will be considered.  Patient education provided on fall prevention strategies.  Follow-up scheduled to monitor blood pressure response to interventions and assess symptom improvement.  ICD-10 code I95.1 (orthostatic hypotension) assigned.