Great News: GS-441524 Is Now Legally Available!

Since June 2024, GS-441524 is legally available from US compounding pharmacies with a veterinary prescription. Oral tablets are now the standard first-line treatment. Ask your vet to prescribe from Stokes Pharmacy, Wedgewood, or other licensed compounding pharmacies.

This cost estimator has been updated (May 2025) to reflect current compounding pharmacy pricing. The original estimator used black-market pricing data that is no longer relevant.

Current Compounding Pharmacy Pricing (2026)

Oral Tablets (Recommended)
50mg scored tablet

~$9-10

per tablet

Quad-scored for precise dosing. Tuna or other flavors available. Now the standard first-line treatment — no daily injections needed for most cats.
Capsules
Multiple strengths
10 mg~$2
20 mg~$6
35 mg~$8
50 mg~$10
75 mg~$11
100 mg~$12
Injectable
20 mg/mL vials

~$45

per 5 mL vial

For critical cases, cats that cannot keep oral meds down, or neurological FIP needing higher bioavailability. Most cats can start on oral tablets instead.
Note: Prices vary by pharmacy and may change. These reflect approximate 2025-2026 pricing from Las Colinas Pharmacy, Avrio Pharmacy, Stokes/Bova, and others. Always confirm pricing with your pharmacy. Vet exam and lab fees are additional costs.

Oral Treatment Cost Estimator

These values are rough approximations. Actual doses, weight gain, and cost will vary. Please work with your veterinarian to determine the appropriate treatment plan for your cat.

Historical Note

The original cost estimator on this site used pricing from black-market GS-441524 sourced from overseas manufacturers (2020–2025 era). Those costs typically ranged from $1–$4 per mg, and the calculator was based on injectable-only treatment at 15 mg/mL concentration.

With regulated compounding pharmacies now available, oral treatment is standard, pricing is more transparent, and quality is assured through third-party testing.