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Benazepril Side Effects

Medically reviewed by Last updated on Oct 31, 2023.

Applies to benazepril: oral tablet.


Oral route (Tablet)

Discontinue benazepril hydrochloride as soon as possible when pregnancy is detected, as injury and death to the developing fetus may occur with use of drugs that act directly on the renin-angiotensin system.

Serious side effects of Benazepril

Along with its needed effects, benazepril may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur while taking benazepril:

Less common

Incidence not known

Other side effects of Benazepril

Some side effects of benazepril may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects.

Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common

Less common

For Healthcare Professionals

Applies to benazepril: oral tablet.


The most common side effects were headache, dizziness, somnolence, and postural dizziness.[Ref]

Nervous system

Common (1% to 10%): Headache, dizziness, somnolence, postural dizziness

Frequency not reported: Hypertonia, paresthesia[Ref]


Rare (less than 0.1%): Decreases in hemoglobin (a low value and a decrease of 5 g/dL)

Frequency not reported: Thrombocytopenia, hemolytic anemia, eosinophilia[Ref]


Frequency not reported: Stevens-Johnson syndrome, pemphigus, dermatitis, pruritus, rash, photosensitivity, alopecia, sweating, angioedema[Ref]


Frequency not reported: Asthma, bronchitis, dyspnea, sinusitis, cough[Ref]


Frequency not reported: Uric acid increased, blood glucose increased, hyponatremia[Ref]


Frequency not reported: Flushing, electrocardiographic changes, hypotension[Ref]


Frequency not reported: Nausea, pancreatitis, constipation, gastritis, vomiting, melena[Ref]


Frequency not reported: Urinary tract infection, frequent urination, impotence, proteinuria[Ref]


Frequency not reported: Serum bilirubin increased, liver enzymes increased[Ref]


Frequency not reported: Infection[Ref]


Frequency not reported: Arthritis, arthralgia, myalgia[Ref]


Frequency not reported: Fatigue, asthenia[Ref]


Frequency not reported: Anxiety, decreased libido, insomnia, nervousness[Ref]


1. Product Information. Lotensin (benazepril). Ciba-Geigy Pharmaceuticals. 2002;PROD.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.