Cushing's Disease in Dogs: What Trilostane (Vetoryl) Really Costs in the UK (And 3 Ways to Pay Less)

Here is the part most owners are not told plainly at diagnosis: Cushing's disease in dogs is managed, not cured. Once your dog starts on trilostane, they stay on it — every day, with food, for the rest of their life — alongside regular blood tests to keep the dose safe.

That means a cost that repeats every month for years: the medication itself, plus the monitoring. And nobody hands you that number when you leave the practice.

This guide does. Below you will find what Cushing's disease actually is, why the same prescription can cost very different amounts from one pharmacy to the next, and three legitimate ways to reduce what you pay without ever compromising your dog's care.

What Cushing's Disease in Dogs Actually Is

Cushing's disease — properly, hyperadrenocorticism — is the body producing too much cortisol, the natural stress hormone. In the right amount cortisol is essential. In excess, month after month, it slowly reshapes the whole body: muscle wastes, the belly drops, the skin thins and the immune system weakens.

The three types — and why it matters for cost

Knowing which type your dog has explains the treatment plan and the monitoring bill.

Which dogs are most at risk

Cushing's is mainly a disease of middle-aged and older dogs, typically from around seven years. It is seen more in smaller breeds — Miniature Poodles, Dachshunds, Yorkshire Terriers, Jack Russells, Bichon Frise — and also in Boxers, Beagles and Staffordshire Bull Terriers.

The Signs Worth Acting On

Individually these look like "just getting older". Together, they are a pattern worth a vet visit:

• Excessive drinking and urinating — usually the earliest and most obvious change
• A ravenous appetite, sometimes with scavenging or stealing food
• A pot-bellied, sagging abdomen
• Hair loss or a thin, dull coat, often symmetrical on the flanks
• Thin skin, slow healing and recurrent skin or urine infections
• Heavy panting and reduced stamina
• Muscle weakness and lethargy

How It's Diagnosed

There is no single instant test. Your vet builds the picture from your dog's history and examination, routine blood and urine tests, and then a specific hormone test — most often an ACTH stimulation test or a low-dose dexamethasone suppression test. An ultrasound of the adrenal glands often follows to tell the pituitary and adrenal types apart.

The Medication — and Why the Active Ingredient Matters More Than the Brand

This is where newly diagnosed owners get confused, and it is also where the money is.

Knowing the active ingredient, not just the brand name, is the single most useful thing you can learn. The active ingredient is what treats your dog — and the same active ingredient can appear at very different prices.

Trilostane (the branded product: Vetoryl)

Trilostane is the cornerstone of treatment. It works by blocking the enzyme that produces cortisol, bringing the excess back under control. It is given daily, with food, and the dose is matched to your dog's weight and blood results.

In the UK the licensed branded product is Vetoryl (Dechra), sold as hard capsules in 10 mg, 30 mg, 60 mg and 120 mg strengths — from around £1.28–£1.45 per capsule depending on strength, pack and pharmacy. The identical active ingredient is also available as compounded (specially prepared) trilostane, which is frequently cheaper for the same treatment.

Why monitoring is part of the cost

Trilostane is powerful, so the dose has to be right. Expect ACTH stimulation blood tests — a few in the first weeks, then periodically for life — to confirm the dose is controlling cortisol without pushing it too low. These recheck tests are a real, recurring part of the budget, not an optional extra.

The Number Nobody Shows You

A dog on lifelong trilostane is a monthly medication cost plus several monitoring tests a year, for years. Because the capsules are a daily, repeat, lifelong prescription, a small difference in price per pack becomes a large difference over your dog's remaining life.

Here is where some owners make the most dangerous choice available to them: they stretch the capsules to make a pack last longer, or skip the recheck tests to save money. With trilostane that is genuinely risky — too little leaves the disease uncontrolled, and a mis-timed or excessive dose can crash cortisol into an emergency.

The answer is not to take less medicine or skip monitoring. It is to pay less for the same medicine. There are clear structural reasons why the same pet medicine costs different amounts across UK pharmacies, and understanding them turns a monthly shock into a managed budget.

3 Ways to Pay Less — Without Compromising Care

1. Ask your vet for a written prescription

In the UK you are legally entitled to ask your vet for a written prescription and buy the medication from a VMD-registered pharmacy of your choice. For a lifelong daily treatment, this one request is usually the single largest saving available.

2. Ask about compounded trilostane — the same active ingredient

Because trilostane is available both as branded Vetoryl and as compounded capsules, there may be an equally suitable option with the same active ingredient at a lower price. Only your vet can decide what is appropriate and prescribe the specific product — but "Is there an equivalent with the same active ingredient that might cost less?" is a fair, sensible question.

3. Sort out insurance before a diagnosis, not after

Once Cushing's is on the record it becomes a pre-existing condition, and cover for it becomes very hard to arrange. If you have a younger dog, or an at-risk breed, this matters now rather than later. It is worth weighing the honest pros and cons of pet insurance for older pets while you still have the choice.

What Good Home Care Looks Like

• Give the capsule with food, at the same time each day — consistency keeps the dose working evenly
• Never restrict water, even though the thirst is dramatic
• Keep the recheck appointments — the blood tests are how the dose stays safe
• Learn the warning signs of too-low cortisol: vomiting, diarrhoea, loss of appetite, weakness — and call your vet the same day
• Watch the water bowl: falling thirst is often the first sign the treatment is working

Frequently Asked Questions

How long can a dog live with Cushing's disease?

With treatment and regular monitoring, many dogs live comfortably for two to four years or more after diagnosis, and often die with the condition rather than from it. Outlook depends on the type, the dog's age and how well they respond to trilostane.

What is the first sign of Cushing's disease in a dog?

Usually a marked increase in thirst and urination, often alongside a bigger appetite. Over weeks to months owners also notice a pot-bellied shape, thinning coat and heavy panting.

Can Cushing's disease in dogs be cured?

The common pituitary-dependent form is managed, not cured: trilostane controls cortisol but is taken for life. The less common adrenal-dependent form can sometimes be cured by surgery, where that is feasible.

How much does Cushing's medication cost in the UK?

It depends on your dog's weight and dose, plus the monitoring blood tests. What is consistent is the spread: identical Vetoryl capsules differ in price between pharmacies, and compounded trilostane with the same active ingredient is often cheaper.

Can I buy Vetoryl without a prescription in the UK?

No. Trilostane is a POM-V medicine and legally requires a veterinary prescription. You can ask for a written prescription and buy from any VMD-registered pharmacy rather than the practice dispensary.

Should I stop trilostane if my dog seems better?

No — and this is important. Feeling better is the medication working. Stopping, doubling up or spacing doses can trigger a dangerous Addisonian crisis. Only your vet should change the dose.

What To Do This Week

The Bottom Line

A Cushing's diagnosis sounds frightening, but it is one of the chronic conditions that responds well to treatment. Diagnosed properly, medicated consistently and monitored carefully, many dogs get their energy, their coat and their comfort back — and go on for years.

What makes the difference is consistency: the capsule with food, the recheck booked, the dose kept exactly as your vet set it. And yes, the treatment fitting your budget every month — because the treatment you can sustain is the only one that works.

The same arithmetic applies to every lifelong prescription. We walk through it for hypothyroidism in dogs and for heart failure in dogs.

Has your dog been diagnosed with Cushing's disease? What are you paying each month, and where? It helps every reader who lands here after their first endocrinology invoice.

Compare prices on your dog's Cushing's medication now on Maggie Search — it is free, and it takes seconds.