this summary report of various clinical studies by our group describes the effects on renal excretion of water and sodium of several different calcium antagonists ( verapamil , gallopamil , nifedipine and felodipine ) which were administered for variable periods of time ( from a single administration to repeated doses over up to 10 days ) to hypertensive patients .
C0042523
verapamil
C0016986
gallopamil