Fortekor Tablets are a prescription veterinary medicine containing benazepril hydrochloride, an angiotensin‑converting enzyme (ACE) inhibitor. Fortekor is commonly used to support dogs diagnosed with congestive heart failure and cats living with chronic renal insufficiency (also called chronic kidney disease).
VETERINARY PRESCRIPTION REQUIRED
Fortekor does not ‘cure’ heart or kidney disease, but it can support other treatments and lifestyle adjustments. The tablets are designed for accurate dosing by bodyweight and are often given once daily. Because Fortekor influences blood pressure and kidney blood flow, your vet may recommend blood tests and sometimes blood pressure measurements before starting and again after any dose changes.
To understand how Fortekor works, it helps to know about the renin–angiotensin–aldosterone system (RAAS), a hormone pathway that regulates blood pressure, blood vessel tone and fluid balance. In heart a...
Fortekor Tablets are a prescription veterinary medicine containing benazepril hydrochloride, an angiotensin‑converting enzyme (ACE) inhibitor. Fortekor is commonly used to support dogs diagnosed with congestive heart failure and cats living with chronic renal insufficiency (also called chronic kidney disease).
VETERINARY PRESCRIPTION REQUIRED
Fortekor does not ‘cure’ heart or kidney disease, but it can support other treatments and lifestyle adjustments. The tablets are designed for accurate dosing by bodyweight and are often given once daily. Because Fortekor influences blood pressure and kidney blood flow, your vet may recommend blood tests and sometimes blood pressure measurements before starting and again after any dose changes.
To understand how Fortekor works, it helps to know about the renin–angiotensin–aldosterone system (RAAS), a hormone pathway that regulates blood pressure, blood vessel tone and fluid balance. In heart and kidney disease, the RAAS can become overactive as the body tries to compensate. This can narrow blood vessels (vasoconstriction), encourage sodium and water retention, and raise pressures within delicate tissues.
Benazepril is converted in the body to benazeprilat, which inhibits ACE and reduces the formation of angiotensin II. With less angiotensin II, blood vessels relax (vasodilation), aldosterone levels fall, and the body is less likely to hold on to salt and water. Clinically, this can reduce afterload (the resistance the heart pumps against) and ease congestion, while also lowering glomerular capillary pressure in the kidneys. By damping down this neurohormonal drive, Fortekor may also help limit ongoing strain and remodelling in the heart and support more stable perfusion of the kidneys and other organs.
In dogs, congestive heart failure develops when the heart can no longer pump efficiently, most often due to chronic degenerative mitral valve disease or dilated cardiomyopathy. As cardiac output drops, pressure can back up into the lungs and lead to fluid accumulation (pulmonary oedema), making breathing more difficult and reducing exercise tolerance. You may notice coughing, faster breathing at rest, reduced stamina, or a reluctance to play and climb stairs. The body releases compensatory hormones that constrict blood vessels and retain fluid, which ultimately increases workload on an already strained heart.
Fortekor helps interrupt this cycle by reducing vasoconstriction and fluid retention, so the heart does not have to work as hard to circulate blood. Vets often use Fortekor alongside other therapies such as diuretics to remove excess fluid and, in many cases, positive inotropes such as pimobendan to support contractility. Follow‑up checks help your vet balance breathing comfort, hydration, kidney values and electrolytes, which is particularly important when more than one heart medicine is being used.
In cats, chronic renal insufficiency means the kidneys have lost functional tissue and are less able to filter waste products, conserve water and regulate electrolytes and blood pressure. It is particularly common in older cats and can progress quietly before signs become obvious. Cats may develop azotaemia, dehydration, nausea, reduced appetite, weight loss and sometimes systemic hypertension. Vets often monitor creatinine, urea and SDMA, along with phosphate, potassium and urine concentration, to build a clear picture of how the kidneys are coping. One important feature in some cats is proteinuria, where damaged filters allow protein to leak into the urine; this is associated with faster progression of kidney disease.
Fortekor can be helpful in suitable cases because ACE inhibition can reduce glomerular hypertension and lower protein loss, supporting more stable kidney function over time. It is not a cure, but Fortekor may sit alongside a renal diet, phosphate control, hydration support, and other medications such as anti‑nausea treatments or blood pressure tablets when needed.
Because heart failure in dogs and chronic renal insufficiency in cats can change gradually, it helps to watch for patterns rather than one‑off “bad days”. A simple routine of checking breathing at rest, appetite, thirst and activity levels can provide useful clues for your vet. Contact your vet promptly if you notice any of the following:
Many owners find it reassuring to keep a short diary, including a dog’s resting respiratory rate and a cat’s weekly weight. If your pet is open‑mouth breathing, struggling to settle, or suddenly very dull, treat it as urgent and seek veterinary advice immediately.
Fortekor should always be given exactly as your vet prescribes, and dosing is tailored to bodyweight and clinical response. Fortekor tablets can usually be given with or without food, and consistency matters more than the method you use. If you ever miss a dose, follow your vet’s advice rather than doubling up, and let the practice know if this happens repeatedly. Fortekor is generally well tolerated, but mild gastrointestinal upset such as vomiting or diarrhoea can occur, and some pets may seem a little quieter when starting treatment.
More significant effects are uncommon but can include hypotension (low blood pressure) or changes in kidney parameters, especially if a pet is dehydrated, on diuretics, or receiving non‑steroidal anti‑inflammatory drugs (NSAIDs). Fortekor is not suitable for every animal, including pets with acute kidney injury, severe hypotension, or known hypersensitivity to ACE inhibitors, and it is usually avoided in pregnancy and breeding animals. Routine monitoring of creatinine, urea and electrolytes (including potassium) helps your vet keep treatment on track, and you should always seek advice if drinking, urination, breathing, or energy levels change suddenly while on Fortekor.
What is Fortekor used for in dogs?
Fortekor is used in dogs with congestive heart failure, often linked to mitral valve disease or dilated cardiomyopathy. As an ACE inhibitor, Fortekor helps reduce harmful hormone activation, relaxes blood vessels, and can lessen fluid congestion. It is usually part of a wider plan that may include diuretics and other heart medicines.
What is Fortekor used for in cats?
Fortekor is used in cats with chronic renal insufficiency, particularly when urinary protein loss (proteinuria) is present. By reducing glomerular pressure, Fortekor may lower protein leakage and support more stable kidney function. Your vet will decide if it is appropriate based on blood tests, urine results, hydration status and blood pressure.
How quickly does Fortekor start working?
Fortekor begins to affect the RAAS soon after dosing, but visible improvements vary. Some dogs breathe more comfortably within days once the overall heart plan is optimised, while kidney‑related benefits may be assessed over weeks through urine protein levels and repeat blood tests. Your vet will advise when to recheck and what changes to expect.
Can Fortekor be given with other heart medicines?
Fortekor is often used alongside diuretics and, in many dogs, medicines such as pimobendan. Combination therapy can be very effective, but it needs veterinary oversight because blood pressure, kidney values and electrolytes may shift. Always tell your vet about any supplements or medicines your pet takes, including NSAIDs.
Should Fortekor be given with food?
Fortekor tablets can usually be given with or without food. Many owners choose to give Fortekor at mealtimes so it becomes a reliable routine. If your cat is on a renal diet, try to hide tablets in vet‑approved foods rather than changing meals suddenly. Consistency helps, and your vet can suggest practical options.
