Why medication cost varies so much
The single biggest factor is your dog's weight — almost every oral drug is dosed in mg per kilogram, so a Great Dane can cost five times what a Chihuahua does for the same medication. The second is where you fill it: clinics mark up dispensed drugs heavily, while online pet pharmacies and human-generic equivalents (with a vet script) are often a fraction of the price.
Brand vs generic matters too. Where a generic exists (carprofen, gabapentin, prednisone, levetiracetam), it's usually far cheaper than the brand. A few drugs — Apoquel, Vetmedin, Galliprant — have no generic yet, so they stay expensive.
Estimate only — not dosing advice
This tool scales a typical published dose by weight and multiplies by indicative US retail pricing to estimate spend. It is not a dose recommendation and prices vary by pharmacy and date. Always confirm the dose with your veterinarian and the price with your pharmacy before purchasing.