Enalapril for Pets
Enalapril is an ACE inhibitor veterinarians prescribe most often for dogs and cats with heart disease, high blood pressure, or protein loss in the urine. It helps relax blood vessels and reduce strain on the heart and kidneys, but it should only be used under veterinary supervision.
Enalapril Quick Facts
Drug class
ACE inhibitor (angiotensin-converting enzyme inhibitor).
Common brand names
Enacard®, Vasotec® and other generic or regional brand products.
Forms
Most commonly given as tablets or oral liquid; injectable forms may be used in a hospital setting.
Species used in
Primarily prescribed for dogs and cats; use is often extra-label and should follow your veterinarian’s instructions.
What Enalapril Is Used For
Enalapril is a cardiovascular medication used in veterinary medicine to help manage congestive heart failure, some cases of high blood pressure, proteinuria (protein in the urine), and certain chronic kidney disease cases when your veterinarian decides it is appropriate. It works by blocking angiotensin-converting enzyme, which lowers activation of the renin-angiotensin-aldosterone system. In practical terms, that means blood vessels relax, blood pressure may decrease, and the heart and kidneys may be under less strain. In dogs and cats, enalapril is usually part of a broader treatment plan rather than a stand-alone fix, especially for heart disease.
Side Effects to Watch For
Common side effects may include: • Decreased appetite • Vomiting • Diarrhea • Tiredness or lethargy
More serious side effects that need prompt veterinary attention may include: • Weakness or collapse • Signs of low blood pressure, such as marked lethargy or faintness • Worsening kidney values on bloodwork or reduced kidney function • Elevated potassium levels • Rash or other signs of a possible allergic reaction • Fever or signs of infection
Because this medication can affect blood pressure, kidney function, and potassium levels, veterinarians often recommend follow-up exams and lab monitoring.
Dosing & Administration
Always follow your vet’s instructions exactly. Enalapril is usually given by mouth as a tablet or liquid, and some pets may receive it with or without food depending on how they tolerate it. If your pet vomits when it is given on an empty stomach, ask your veterinarian whether giving future doses with food is appropriate. Measure liquid doses carefully, keep fresh water available, and do not stop the medication suddenly unless your veterinarian tells you to. Your vet may recommend periodic bloodwork, blood pressure checks, and kidney monitoring while your pet is taking this medication. Never adjust the dose, double up doses, or combine it with other medications unless your veterinarian approves.
When to Call a Vet
Go to the ER now
- ● Your pet collapses, becomes very weak, has trouble breathing, or seems unresponsive after taking enalapril.
- ● You notice facial swelling, hives, severe vomiting, or other signs of a possible allergic reaction.
- ● You suspect an overdose or your pet got into a human prescription bottle.
- ● Your pet has severe dehydration, cannot keep water down, or has signs of shock.
See a vet within 24 hours
- ● Vomiting, diarrhea, poor appetite, or lethargy lasts more than a day or seems to be getting worse.
- ● Your pet is drinking or urinating much less than usual, which may suggest a kidney concern.
- ● You notice worsening cough, fast breathing, or other signs of heart disease despite treatment.
- ● Your pet starts a new medication or supplement and you are not sure whether it is safe to combine with enalapril.
Watch at home, call if it worsens
- ● Mild stomach upset after starting the medication, especially if your pet otherwise seems comfortable.
- ● Mild tiredness that is brief and does not worsen.
- ● Questions about giving the medication with food, using a liquid form, or timing missed doses.
Frequently Asked Questions
Can I give my dog human enalapril?
What happens if I miss a dose?
Can my cat take enalapril?
Do pets on enalapril need monitoring?
Should I stop enalapril if my pet seems better?
Disclaimer: The information provided in this article is for educational purposes only and does not constitute veterinary medical advice. Reading this content does not establish a veterinarian-client-patient relationship. Every pet is different — always consult a licensed veterinarian before making decisions about your pet's health, diet, or care. If you'd like personalized guidance, you can talk to one of our vets. If your pet is experiencing a medical emergency, contact your local emergency animal hospital immediately.