| CPC A61K 31/41 (2013.01) [A61P 9/04 (2018.01)] | 13 Claims | 
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               1. A method for treating hypertension or heart failure, the method comprising administering 180-500 mg per day of a complex of an angiotensin II receptor antagonist metabolite and an NEP inhibitor to a patient, and the structural unit of the complex being as follows: 
            (aEXP3174·bAHU377)·xCa·nA 
                wherein a:b=1:0.25 to 4; x is a number between 0.5 and 3; A represents water; and n is a number between 0 and 3. 
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