Semintra for Cats
Kidney Disease Treatment
Palatable oral liquid for chronic kidney disease. Easy to dose with the syringe provided. Save up to 45% buying online.
Buy Semintra at UK pharmacy prices
UK registered pharmacies dispense the same Semintra your vet prescribes, often for less. Ask your vet for a written prescription (capped at £21 under the CMA Order, from 2027), then fill it online.
Affiliate link to The Pharm Pet Co., a UK registered veterinary pharmacy. We may earn a small commission, at no extra cost to you. Always follow your vet's guidance on medication choice and dosing.
What is Semintra?
Semintra is an oral solution containing telmisartan, manufactured by Boehringer Ingelheim. It is the only angiotensin II receptor blocker (ARB) licensed specifically for cats in the UK. It is indicated for the reduction of proteinuria associated with chronic kidney disease (CKD) in cats.
Chronic kidney disease affects up to 30% of cats over 15 years old and is one of the leading causes of death in older cats. Semintra works by blocking the angiotensin II receptor, which reduces pressure within the kidney glomeruli and decreases protein leakage into the urine. Reducing proteinuria is associated with slower progression of kidney disease.
The key advantage of Semintra is its liquid formulation. Many cats with kidney disease are difficult to tablet, and the oral solution with dosing syringe makes administration much easier. The 4 mg/ml concentration means most cats need less than 1 ml per dose. It also comes as 10 mg tablets for cats that prefer solid medication.
Easy to dose with syringe — no tablets to give
Single dose per day for continuous kidney protection
Only licensed ARB for cats in the UK
Semintra Price Comparison
Semintra 4 mg/ml — 30ml bottle
Semintra 4 mg/ml — 100ml bottle
Semintra 10 mg tablets — 28 tablets
Side Effects & Warnings
Common Side Effects
- • Mild vomiting
- • Diarrhoea
- • Reduced appetite
- • Mild weight loss
Monitoring Required
- • Blood pressure checks (can cause hypotension)
- • Kidney values (urea, creatinine, SDMA)
- • Urine protein:creatinine ratio (UPC)
- • Every 3-6 months once stable
Alternatives to Semintra
Fortekor (Benazepril)
ACE inhibitor tablet for cats with CKD. Equally effective. Some cats prefer tablets over liquid. See our Fortekor guide.
Renal Prescription Diets
Hill's k/d, Royal Canin Renal, Purina NF. Reduced phosphorus and protein. Often used alongside Semintra. Essential part of CKD management.
Frequently Asked Questions
Reducing proteinuria in cats with chronic kidney disease. An ARB that protects the kidneys and slows CKD progression.
£25-£45 for a 30ml bottle at the vet, £15-£28 online. Annual savings of £80-£150 buying online.
Both are effective. Semintra is a liquid (easier for some cats). Some evidence it may be slightly better at reducing proteinuria. Discuss with your vet.
Mild vomiting, diarrhoea and appetite loss. Low blood pressure can occur. Regular monitoring required.
Oral liquid once daily via dosing syringe. Can be given directly or mixed into food. 1 mg/kg is the standard dose.
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Save on Semintra for your cat
Kidney disease medication is lifelong. Buying online saves £80-£150+ per year.