💊 Med cost guide
How much does Felimazole cost?
Felimazole (methimazole) is an antithyroid from Dechra (Felimazole); human generics available, used for feline hyperthyroidism — lifelong unless treated definitively. Here's what it actually costs in the US — and how to pay less.
Typical monthly cost
$20–$60 / month
Drug cost is modest; recurring T4 bloodwork is the bigger line item. Compounded transdermal typically costs more than tablets.
What you'll pay
| Typical price | Unit |
|---|---|
| $20–$60 | per ~30-day supply |
Felimazole from ~$20 with GoodRx coupon; 100-count bottles at Chewy/Petco/Allivet stretch cost further.
Label dosing (for cost context, not a recommendation): Public label: starting dose usually 2.5 mg twice daily, adjusted to thyroid bloodwork.
Why it costs what it does
Felimazole comes as: coated tablets (2.5, 5 mg), typically twice daily at home; compounded transdermal gel available for pill-averse cats. A few things set the price:
- It's a human medication (or has a human-generic equivalent), so the cheapest fills are usually at a human pharmacy with a discount coupon — not the vet's office. Ask for a written prescription.
Cheaper alternatives to ask your vet about
Generic human methimazole filled at a human pharmacy with a coupon is the cheapest route; radioactive iodine (I-131) is a one-time cure that beats years of pills on total cost; prescription iodine-restricted diet is another path a vet might discuss.
Never switch, split, or stop a prescription on your own — bring these options up at your next visit and let your vet make the call for your pet.
Before you fill
Price-check before you buy
The same prescription can vary 2–3× between the vet's shelf, online pet pharmacies, and retail. A written prescription is yours to fill anywhere — vets are required to provide one on request.
Disclosure: Meow Howl may earn a commission if you buy through links on this page, at no extra cost to you. Commissions never influence our pricing research.
Help paying for Felimazole
- GoodRx for Pets — Often the single biggest saver for chronic meds like gabapentin or fluoxetine — frequently cheaper than the vet's in-clinic price.
- Walmart $4 Generic Prescriptions (works for pets) — Kroger, and some grocery chains run similar low-cost generic lists — always ask.
- Costco Member Prescription Program (CMPP) — Worth a price check on any expensive monthly med if you already hold a membership.
Sources & price verification
- GoodRx — coupon low ~$20 (accessed 2026-06-11)
- Chewy Rx — 5 mg retail listing (accessed 2026-06-11)
- VetRxDirect — label dosing (2.5-5 mg twice daily start) (accessed 2026-06-11)
How we verify these prices
Prices aggregated 2026-06-11 from public retailer listings (Chewy Rx, Petco, Heartland Vet Supply, EntirelyPets Rx, BudgetPetCare, PetBucket), GoodRx coupon pages, manufacturer pages, and 2026 vet-cost guides. Vet-administered injectables (Librela, Solensia, Cytopoint, Adequan loading) use published clinic-price surveys because the drug is not sold direct to consumers. Ranges are medication-only unless noted; exam/administration fees are flagged separately. Prices move — re-verify before publishing figures on a page, and show the per-item verified date.
Last verified: June 11, 2026 · Region: US · Currency: USD
