Long term reduction in sodium balance: possible additional mechanism whereby nifedipine lowers blood pressure.

Examines the changes in sodium excretion and sodium balance after withdrawal of long term nifedipine in London, England. Use of nifedipine for treating angina and hypertension; Reduction of urinary sodium excretion during withdrawal of nifedipine; Effect of nifedipine treatment on the reduction in sodium balance of the patient.