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Recommended for adult cats weighing 2–4 kg. One vial provides approximately 5–7 days of treatment at standard dosing, depending on FIP type and body weight.

 

Your cat will gain weight as appetite and muscle mass return during treatment. Weigh weekly and recalculate the dose — underdosing due to weight gain is the most common treatment error. Use our dosage calculator to determine the exact daily injection volume.

 

Most cats show visible improvement within the first vial: increased appetite, more physical activity, fever reduction, and resumed self-grooming.

Watch our instructional video on how to perform subcutaneous FIP injections.

GS-441524 Antiviral Injection — 20 mg/ml | 8 ml Vial

Rating is 4.9 out of five stars based on 67 reviews
SKU: SP20MG8ML
€69.00Price
Quantity
  • Product Specifications — GS-441524 Injectable Solution

    Parameter Value
    Active ingredient GS-441524
    Chemical formula C₁₂H₁₃N₅O₄
    Concentration 20 mg/ml
    Volume 8 ml per vial
    Purity ≥ 99.4%
    pH 1.9–2.2
    Quantity 1 vial

    Formulation

    5% ethanol, 30% propylene glycol, 45% PEG 400, 20% water for injection.

    Storage

    Store at room temperature (15–25°C / 59–77°F). Do not refrigerate or freeze. Temperatures below 8°C (46°F) may cause the active pharmaceutical ingredient to precipitate or crystallize, compromising the solution's uniformity and dosing accuracy.

    Shelf life: 12 months from date of manufacture when stored as directed.

Reviews

Rated 4.9 out of 5 stars.
4.9 | 67 reviews
67 reviews
  • EllyAug 23, 2025
    Rated 5 out of 5 stars.
    Verified
    Salvezza

    La piccola Mini ha 1 anno, FIP secca con febbre, diarrea, vomito, inappetenza, letargia. Dopo una settimana di iniezioni ha riacquisto appetito, la febbre non c'è più, il vomito e la dissenteria sono scomparsi... è tornata la nostra piccola vispa micetta! La cura in fiala GS-441524 20 mg e le integrazioni da parte del nostro veterinario le hanno salvato la vita. Sta riacquistando peso ed energie velocemente. Siamo soddisfattissimi e di nuovo sereni . La cura funziona. I sacrifici per poterla avere ne valgono decisamente la pena.

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  • ChaseMay 30, 2025
    Rated 5 out of 5 stars.
    Saved our cat

    She is back to her old self. We are grateful for this treatment.

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  • Veronica CeceMar 07, 2025
    Rated 5 out of 5 stars.
    Verified
    Ottimo

    Iniziato la cura per i miei 2 gatti! La cura sembra funzionare ho notato subito un miglioramento nel loro comportamento! Grazie!!!

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