How much does trilostane (Vetoryl) cost for dogs?

Trilostane costs approximately $80–$200/month depending on your dog's weight. Smaller dogs (under 20 lbs) typically cost $80–$120/month. Larger dogs (50+ lbs) can run $150–$250/month. Compounded trilostane from a compounding pharmacy can reduce this cost by 30–50%.

How much does the ACTH stimulation test cost?

An ACTH stimulation test typically costs $150–$300 at a general practice vet and $250–$400 at a specialist or emergency clinic. Dogs on trilostane need this test approximately every 1–3 months during dose titration, then every 3–6 months once stable — adding $600–$1,200/year in monitoring costs alone.

Does pet insurance cover Cushing's disease in dogs?

Yes, if the diagnosis occurs after enrollment and after any waiting period. If your dog was already showing symptoms or had abnormal bloodwork before you enrolled, Cushing's will likely be classified as a pre-existing condition and excluded. Some insurers treat Cushing's as a bilateral/hereditary condition and may have breed-specific exclusions for Poodles, Dachshunds, and Boxers.

Is there a cheaper alternative to Vetoryl for Cushing's disease?

Compounded trilostane is the most common cost-reduction option — same active ingredient, 30–50% cheaper than branded Vetoryl. Mitotane (Lysodren) is an older alternative that costs less but requires more intensive monitoring. Generic trilostane capsules are available through compounding pharmacies with a prescription.

Cushing's Disease Dog Treatment Cost: Full Breakdown

Q: How much does it cost to treat Cushing's disease in dogs?

Expect $1,500–$5,000+ in the first year, which includes diagnosis ($400–$800), medication initiation, and initial monitoring. Ongoing costs run $500–$2,000 per year depending on your dog's size (trilostane is dosed by weight), how stable the disease is, and how frequently ACTH stimulation tests are needed.

Cost summary

Year one total

$1,500–$5,000+

Diagnosis + meds + monitoring

Ongoing annual cost

$500–$2,000

Meds + ACTH stim tests

Monthly medication

$80–$250

Depends on dog's weight

A Cushing's disease diagnosis is one of the more financially significant things that can happen with a dog's health — not because of a single large bill, but because of the ongoing monthly cost of medication and the frequent monitoring tests required for safe management. Here is an honest breakdown of what to expect.

Diagnosis Costs

Diagnosing Cushing's disease is a multi-step process. It rarely happens in one visit. Dogs typically arrive with symptoms — pot-bellied appearance, excessive drinking and urinating, hair loss, panting — and an initial blood panel showing elevated ALP.

Diagnostic Cost Breakdown

Test / Step	Typical cost	Notes
Initial blood panel (CBC + chemistry)	$150–$300	Often shows elevated ALP, cholesterol, and dilute urine
Urinalysis	$40–$80	Low urine specific gravity is a common Cushing's finding
ACTH stimulation test (screening)	$150–$300	Primary diagnostic test for Cushing's
Low-dose dexamethasone suppression test	$150–$300	Alternative or confirmatory test
Abdominal ultrasound	$200–$500	Identifies adrenal vs. pituitary origin (affects treatment)
Urine cortisol:creatinine ratio	$80–$150	Screening test, high sensitivity but low specificity

Most dogs will need at minimum a blood panel, ACTH stimulation test, and ultrasound before treatment begins — putting diagnosis costs at $400–$800 in straightforward cases. Complex or ambiguous presentations requiring multiple rounds of testing can run $800–$1,500 in diagnostics alone.

Medication Costs

Trilostane (Vetoryl) is the standard first-line treatment for pituitary-dependent Cushing's disease — the most common form, accounting for about 85% of cases. It blocks cortisol synthesis and must be given daily, indefinitely.

Cost is weight-based because the dose is weight-based (typically 1–5 mg/kg/day):

Trilostane Monthly Cost by Dog Size

Dog size	Branded Vetoryl	Compounded trilostane	Annual (branded)
Small (under 20 lbs)	$80–$120/mo	$40–$70/mo	$960–$1,440
Medium (20–50 lbs)	$120–$180/mo	$60–$100/mo	$1,440–$2,160
Large (50–80 lbs)	$160–$230/mo	$80–$130/mo	$1,920–$2,760
Extra large (80+ lbs)	$200–$280/mo	$100–$160/mo	$2,400–$3,360

Mitotane (Lysodren) is an older alternative — it destroys part of the adrenal cortex rather than blocking cortisol synthesis. It costs less than trilostane ($30–$80/month) but requires a more intensive induction protocol, more careful monitoring, and carries higher risk of adrenal crisis. Most vets now prefer trilostane for most cases.

Dogs with adrenal tumors (the remaining ~15% of cases) may require adrenalectomy surgery — a specialist procedure costing $3,000–$8,000 — instead of ongoing medication.

Monitoring Costs: The Hidden Ongoing Expense

This is where Cushing's disease surprises most owners. Trilostane can cause life-threatening adrenal insufficiency if the dose is too high — which means regular ACTH stimulation tests are not optional, they are required for safe management.

Monitoring Schedule and Costs

Monitoring event	When	Cost per test
ACTH stim test — initial titration	10 days, 30 days, 90 days after starting	$150–$300 each
ACTH stim test — stable disease	Every 3–6 months	$150–$300 each
Blood panel (chemistry)	With each ACTH stim test	$80–$150 each
Urinalysis	Every 6 months	$40–$80
Emergency ACTH stim test (dose concerns)	Any time clinical signs change	$150–$300

A stable dog on an established dose needs roughly 2–4 ACTH stimulation tests per year, plus blood panels at each visit. That's $500–$1,200/year in monitoring alone on top of medication. During the initial titration phase (first 3–6 months), monitoring costs can exceed the medication cost.

Total Cost Scenarios

Small dog, stable quickly

~$2,000 year 1

~$800/yr

Diagnosis $500 + meds $960 + monitoring $500

Medium dog, typical

~$3,000 year 1

~$1,200/yr

Diagnosis $700 + meds $1,440 + monitoring $800

Large dog, complex titration

~$4,500+ year 1

~$2,000/yr

Diagnosis $800 + meds $2,400 + monitoring $1,200

Can Pet Insurance Cover Cushing's Disease?

Yes — if the diagnosis happens after enrollment and after the waiting period. Pet insurance is most valuable for Cushing's disease precisely because the costs are ongoing and predictable: you know you'll spend $1,000–$2,000/year every year for the rest of the dog's life.

The critical caveat: insurers review vet records during claims. If your dog had symptoms (pot-belly, excessive drinking, hair loss) or abnormal ALP on bloodwork before you enrolled, Cushing's will almost certainly be classified as pre-existing and excluded. The time to get insurance is before symptoms appear — which is difficult to predict but worth acting on proactively for at-risk breeds.

Higher-risk breeds that owners should consider insuring early: Poodles (all sizes), Dachshunds, Boxers, Beagles, Boston Terriers, Yorkshire Terriers, Labrador Retrievers, and German Shepherds.

Get pet insurance before a Cushing's diagnosis

If your dog is a higher-risk breed and hasn't been diagnosed yet, now is the time. Compare plans that cover endocrine conditions, ongoing medication, and monitoring bloodwork.

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Cost-Reduction Strategies

Ask about compounded trilostane

Same active ingredient as Vetoryl, 30–50% cheaper. Requires a prescription from your vet and a compounding pharmacy. Not all vets are comfortable with compounded drugs — ask specifically.

Bundle ACTH stim tests with blood panels

Most vets run a chemistry panel at the same visit as the ACTH stimulation test. Ask if there's a bundled price — running both separately is more expensive than combining into one visit.

Use a veterinary school or low-cost clinic for monitoring tests

ACTH stimulation tests are straightforward once the protocol is established. Veterinary school teaching hospitals often charge significantly less for monitoring visits than private specialty clinics.

Track results between visits

Catching dose-related problems early (through symptom monitoring and keeping detailed records) can prevent emergency ACTH stim tests and unplanned visits, which are significantly more expensive than scheduled ones.

Keep your dog's cortisol results organized

Upload each ACTH stimulation test and blood panel to VetLens — track cortisol trends, flag when values are changing, and arrive at every vet visit with a complete monitoring history in hand.

Track My Dog's Cushing's Results

Frequently Asked Questions

How much does it cost to treat Cushing's disease in dogs?

Expect $1,500–$5,000+ in year one (diagnosis + medication + initial monitoring), then $500–$2,000/year ongoing depending on dog size and how frequently monitoring tests are needed.

How much does trilostane (Vetoryl) cost per month?

$80–$250/month depending on your dog's weight. Compounded trilostane is 30–50% cheaper than branded Vetoryl with the same active ingredient.

How often does my dog need ACTH stimulation tests on trilostane?

Every 10 days, 30 days, and 90 days when first starting, then every 3–6 months once stable. Each test costs $150–$300 at most practices.

Does pet insurance cover Cushing's disease?

Yes, if diagnosed after enrollment and after the waiting period. If your dog already had symptoms or an elevated ALP before you enrolled, it will likely be excluded as pre-existing.

Is there a cheaper alternative to Vetoryl?

Compounded trilostane from a compounding pharmacy is the most practical cost-reduction option. Mitotane is cheaper but requires more intensive monitoring and has higher complication risk.

How Much Does It Cost to Treat Cushing's Disease in Dogs?