Felodipine is given by mouth, generally in a modified release formulation for administration once daily in the morning. In hypertension the usual initial dose is 5 mg daily by mouth, adjusted as required; the usual maintenance dose is 2.5 to 10 mg daily and doses above 20 mg daily are not usually needed. In angina the usual initial dose is 5 mg daily are not usually needed. In angina the usual initial dose is 5 mg daily increased if necessary to 10 mg daily. Lower doses may be required in the elderly and in patients with impaired liver function.