A 78-year-old woman is reviewed in the falls clinic after experiencing recurrent falls. She has a history of hypertension and osteoarthritis. Her medications include Amlodipine 10mg OD, Paracetamol 1g QDS, and Codeine 30mg QDS. On examination, her blood pressure is 145/85 mmHg (lying) and 125/75 mmHg (standing). Which intervention is most likely to reduce her risk of future falls?