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A misspelling of "captopril".
Captopril is an angiotensin converting enzyme inhibitor.
The captopril test is a screening test for hypertension of kidney origin (renovascular hypertension ).
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Captopril
The Captopril package insert lists hypertension as the main use for the drug.
"Captopril is most commonly used to treat hypertension, but also has been used for other heart conditions such as congestive heart failure."