Benazepril, brand name Lotensin, is a medication used to treat high blood pressure (hypertension), congestive heart failure, and chronic renal failure. Upon cleavage of its ester group by the liver, benazepril is converted into its active form benazeprilat, a non-sulfhydryl angiotensin-converting enzyme (ACE) inhibitor.

Oral tablets, 5 mg, 10 mg, 20 mg, and 40 mg.

Benazepril is also available in combination with hydrochlorothiazide, under the trade name Lotensin HCT, and with amlodipine (trade name Lotrel).

Most commonly, headache and cough. Anaphylaxis and angioedema can occur. Hyperkalemia, or an elevation of potassium levels, can also occur.

Benazepril may cause harm to the fetus during pregnancy.

Benazepril should be discontinued during pregnancy.

According to a 2006 article in the New England Journal of Medicine, patients with advanced renal insufficiency taking benazepril showed "substantial" kidney benefits.

A long term study of patients' kidney disease revealed that patients who took benazepril had better kidney function and a slower progression of kidney disease. Kidney function was much better in the group of patients taking the drug than their peers who took a placebo drug. This is notable because this category of pharmaceuticals have long been thought to cause further kidney damage or increase the rate of progression for kidney disease.

According to coverage of the study on WebMD:

This study marks the first indication that benazepril, and perhaps other ACE inhibitors, may actually be beneficial in the treatment of hypertension in patients with kidney disease.