A 58-year-old man with hypertension, treated with ramipril 10mg daily, presents for a routine review. His blood pressure is 145/92 mmHg. Blood tests show: Na+ 140 mmol/L, K+ 5.7 mmol/L, Urea 7.2 mmol/L, Creatinine 120 µmol/L (eGFR 55 ml/min/1.73m²). What is the most appropriate immediate action regarding his ramipril?