To switch from many years of taking Atenolol to starting Amlodipine, should you reduce Atenolol gradually (at the same time as starting the Amlodipine) or just stop taking it? If stopping it gradually, should you continue taking part dose of Atenolol at bedtime and the new Amlodipine in the morning? Or both drugs together at bedtime? How long should the period be of switching to Amlodipine alone?