Side Effects of Enalapril on Dogs

If your dog's been suffering from high blood pressure or congestive heart failure, the vet may have prescribed an angiotensin-converting enzyme inhibitor, or ACE inhibitor. Enalapril is a generic version of an ACE inhibitor, promoting better blood circulation. It has a number of side effects, ranging from lethargy and nausea to gastrointestinal reactions.

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Potential Reactions to Enalapril

As an ACE inhibitor, enalapril blocks the conversion of an enzyme that narrows blood vessels. The relaxed blood vessels allow blood to flow more freely, reducing blood pressure and the heart's workload. It's useful for a dog in kidney failure, particularly when paired with a diuretic, as well as for treating heart failure and high blood pressure. A dog may have an allergic reaction to the drug, resulting in hives or labored breathing, or he may experience other side effects. Occasionally a dog will experience vomiting, diarrhea and decreased appetite from the drug. Other side effects include dizziness, fainting, digestive tract ulcers, high potassium levels and fever. Since it lowers blood pressure, it may also make a dog lethargic. If your dog becomes sick or listless while taking enalapril, let your vet know; he may adjust the dose. Enalapril interacts with drugs such as potassium supplements and corticosteroids. Pregnant and lactating dogs shouldn't take this drug.