Na- &/or vol-depleted patients. Concomitant use w/ K supplements, K-sparing diuretics, salt substitutes containing K or other products containing K. Patients w/ unilateral or bilateral renal artery stenosis; recent kidney transplantation. Primary hyperaldosteronism, angioedema, heart failure, post-MI infarction, aortic & mitral valve stenosis. Dual blockade of renin-angiotensin-aldosterone system. Mild to moderate hepatic impairment. Monitor K levels & creatinine in moderate renal impairment. Pregnancy & lactation.