The invention is directed to nonpeptide substituted spiroheterobenzazepine of Formula I, which are useful as vasopressin receptor antagonists for treating conditions associated with vasopressin receptor activity such as those involving increased vascular resistance and cardiac insufficiency, including congestive heart failure, hyponatremia, and hypertension. Pharmaceutical compositions comprising a compound of Formula I and methods of treating conditions such as hypertension, congestive heart failure, cardiac insufficiency, coronary vasospasm, cardiac ischemia, liver cirrhosis, hyponatremia, renal vasospasm, renal insufficiency, renal failure, diabetic nephropathy, cerebral edema, cerebral ischemia, stroke, thrombosis, or water retention are also disclosed.