Pet Costs

Cat Diabetes Treatment Cost: Insulin vs the Once-Daily Oral Drugs, and Why the First Months Matter Most

By PetPawCalc Team · October 20, 2026 · 9 min read · How we write

Diabetes is one of the most common hormonal diseases in older cats, and the diagnosis usually comes with a quiet panic about money. The good news is that a diabetic cat can live comfortably for years, and the 2018 AAHA Diabetes Management Guidelines note that some cats go into remission, at which point the largest monthly cost disappears.

The bill depends far more on a few early decisions than on the diagnosis itself: insulin or one of the newer oral drugs, home testing or clinic testing, and how quickly the disease is brought under tight control. Here is what each part costs and where the money actually goes.

What Each Part Costs

Typical US price ranges:

Item What it covers Typical cost
Diagnosis Exam, bloodwork, urinalysis, often fructosamine and a urine culture $200–$500
Insulin ProZinc or Vetsulin vials, or glargine pens from a human pharmacy About $30–$150 a month
Syringes Twice-daily injections, about 60 a month About $12–$20 a month
Home glucose meter Human meters work for home trend checks; pet meters cost more $20–$100 one-time
Test strips Cheaper for human meters, more for pet-specific meters About $10–$50 a month
Rechecks with fructosamine Every 1–4 weeks at first, then every few months once stable About $100–$250 each
Diet Prescription diabetic diet or a vet-approved low-carb canned food About $30–$100 a month
Oral SGLT2 drug (instead of insulin) Bexacat tablet or Senvelgo liquid, once daily About $53 a month at list; roughly $100–$150 at most clinics
Emergency: diabetic ketoacidosis Several days of intensive care $1,500–$5,000

Insulin is the item with the widest range. Vials of veterinary insulins sell for roughly $80–$130, and how long one lasts depends on the dose and on how long your vet wants an opened vial used. Glargine bought as pens through a human pharmacy can cost far less than the full-price vial with a discount program, which is why owners comparing notes report such different monthly figures. Ask your vet which insulin they want and whether a pharmacy prescription is an option before assuming the clinic price is the only one.

What the First Year Adds Up To

Adding up the ranges above for a cat on insulin:

Insulin, cost item First year: low First year: high
Diagnosis $200 $500
Insulin (12 months) $360 $1,800
Syringes (12 months) $144 $240
Meter $20 $100
Test strips (12 months) $120 $600
Rechecks (5–8 in the first year) $500 $2,000
Diet (12 months) $360 $1,200
First-year total $1,704 $6,440

Once the dose is stable, rechecks drop to two to four a year and diagnosis is no longer on the bill, so a stable year usually runs about $1,200–$4,800. The low end assumes an affordable insulin, a human glucose meter and an over-the-counter low-carb canned food your vet approves; the high end assumes clinic-priced insulin, a pet-specific meter and a prescription diet.

Why the First Months Matter Most

Remission is the single biggest swing in the long-term cost, and it is time-sensitive. A review of the research presented at the Central Veterinary Conference reports remission in roughly 17% to 67% of cats after insulin treatment starts, most often in the first few months. The factors linked to higher remission rates are:

That is why the early rechecks are worth paying for rather than stretching out. A cat that reaches remission at month three or four stops needing insulin, syringes and most of the test strips, which takes the ongoing cost down to the diet and periodic checks. Remission is not guaranteed and diabetes can come back, so those checks still matter.

The diet part is the cheapest lever. The AAHA guidelines recommend a high-protein, low-carbohydrate diet for diabetic cats, with canned food preferred because it is lower in carbohydrates and easier to portion. For an overweight cat, they suggest losing about 0.5–2% of body weight per week. Our Cat Weight Calculator and Pet Food Calorie Calculator help with the target and the daily portion.

Insulin or the Once-Daily Oral Drug?

Two oral drugs, Bexacat (bexagliflozin, a tablet) and Senvelgo (velagliflozin, a liquid), are FDA-approved for diabetic cats. Both are SGLT2 inhibitors, given once a day, and many owners see them as a way to avoid twice-daily injections. They suit some cats well, but the choice has rules that insulin doesn’t:

On price, the oral drugs are not the bargain they are sometimes described as. When Bexacat launched, Elanco put its list price at about $53 a month, but most clinics were expected to charge $100–$150, which is in the same range as many insulin setups. What you save is syringes and much of the home glucose testing. What you take on is the ketone monitoring and the one-way decision.

Home Testing Saves More Than It Costs

Clinic glucose curves typically cost $100–$200 each, and the AAHA guidelines do not recommend in-hospital curves for cats at all, because stress raises a cat’s blood glucose and makes the readings unreliable. Instead, they recommend judging control by how the cat looks and feels alongside home testing and fructosamine.

A basic home meter and strips usually cost less per month than a single clinic curve. Some owners use a continuous glucose sensor such as the FreeStyle Libre, which costs roughly $33–$90 per sensor depending on the pharmacy. Use in cats is off-label, sensors may not last their full rated time, and readings are least reliable in the first day, so your vet should be on board before relying on one. Home testing also makes low blood sugar (hypoglycemia) easier to catch before it becomes an emergency.

The Expensive Outcome to Avoid

Diabetic ketoacidosis is the main way a manageable diabetes bill becomes a large one. It usually needs several days of intensive care, and hospitalization commonly costs $1,500–$5,000. It can be the way diabetes is first discovered, which is a good reason not to ignore early signs: drinking and urinating much more than usual, weight loss despite a good appetite, and in some cats a flat-footed walk on the back legs.

Senior bloodwork usually catches diabetes before it reaches that stage. The Cat Vet Visit Scheduler shows when senior checkups are due, and How Much Does a Cat Vet Visit Cost? covers what those visits cost.

A Note on Insurance

Accident-and-illness pet insurance can cover diabetes, including insulin and monitoring under many policies, but only if the condition wasn’t diagnosed, or showing signs, before coverage began. Diabetes is a chronic condition, so a policy bought after the diagnosis will normally exclude it. Check whether a policy limits chronic-condition coverage or treats prescription diets as excluded.

Frequently Asked Questions

How much does it cost to treat a diabetic cat? Typically about $1,700–$6,400 in the first year and $1,200–$4,800 a year once the cat is stable. The first year costs more because of diagnosis ($200–$500) and frequent rechecks while the dose is worked out. The biggest ongoing variables are which insulin you use (roughly $30–$150 a month), whether you test at home, and whether you feed a prescription diet or a vet-approved low-carbohydrate canned food.

Is the oral diabetes drug for cats cheaper than insulin? Not by much once the vet markup is included. When Bexacat launched, Elanco put its list price at about $53 a month, but vets were expected to charge roughly $100–$150. That is in the same range as many insulin setups. The real savings are no syringes and less home glucose testing; the trade-off is a mandatory ketone-monitoring schedule and the fact that not every cat is eligible.

Can a diabetic cat go into remission? Yes. Studies summarized at the Central Veterinary Conference report remission in roughly 17% to 67% of cats treated with insulin, most often within the first few months of treatment. It is more likely when treatment starts soon after the disease develops, blood glucose is tightly controlled, and the cat eats a low-carbohydrate diet. A cat in remission no longer needs insulin, which removes the largest monthly cost, but it still needs weight control and periodic checks because diabetes can return.

Why can’t my cat switch from insulin to Bexacat or Senvelgo? Because the FDA warns that cats previously treated with insulin face a higher risk of diabetic ketoacidosis (DKA), including a form with normal blood glucose that is easy to miss, and death. Both drugs are labeled only for cats that have not been on insulin. That makes the choice at diagnosis one-way: a cat started on an oral drug can move to insulin if it doesn’t work, but a cat started on insulin generally stays on insulin.

Do I need to pay for glucose curves at the vet? Usually far less often than owners expect. The 2018 AAHA Diabetes Management Guidelines do not recommend in-hospital glucose curves for cats, because stress pushes a cat’s blood glucose up and makes the readings unreliable. Home testing with an inexpensive meter, plus fructosamine blood tests and how the cat looks and acts, is what most vets use to adjust the dose. A glucose curve done in the clinic typically costs $100–$200 each time.

What happens if a diabetic cat isn’t treated? Untreated diabetes can progress to diabetic ketoacidosis, a life-threatening emergency that usually needs several days of intensive care. Hospital treatment for DKA commonly costs $1,500–$5,000. Sudden loss of appetite, vomiting, weakness or lethargy in a diabetic cat — or in a cat on Bexacat or Senvelgo — needs a vet the same day.