Basmi FIP™ GS-441524 Injectable 30mg/ml
The Standard Concentration — Basmi FIP™'s Most Widely Used FIP Injectable
What This Product Is
Basmi FIP™ GS-441524 30mg/ml is the most widely used formulation in the Basmi FIP™ injectable range. It contains GS-441524 — a nucleoside analogue antiviral — at a concentration optimised for the standard FIP treatment protocol in adult cats weighing 2.5 to 5 kg. It covers all primary FIP presentations without neurological involvement: wet (effusive) form, dry (non-effusive) form, and ocular form.
The 30mg/ml concentration is not the standard because it is the middle option in our range. It is the standard because it produces the most clinically practical injection volume for the weight range that represents the majority of FIP cases — adult domestic cats between 2.5 and 5 kg.
Why 30mg/ml Is the Clinical Default
FIP treatment dosing is determined by mg of GS-441524 per kg of body weight. Across the 2.5–5 kg adult cat weight range, the 30mg/ml concentration simultaneously satisfies three requirements that determine clinical practicality:
The injection volume is large enough to be measured accurately with a standard syringe — eliminating the measurement error risk associated with the very small volumes produced by 40mg/ml in this weight range.
The injection volume is small enough to be administered comfortably in a single subcutaneous injection — avoiding the excessive volumes produced by 20mg/ml in this weight range.
The concentration is consistent enough to support precise daily dose adjustment as a cat's weight changes during treatment — which is common as cats in recovery gain condition.
This is why 30mg/ml accounts for the majority of Basmi FIP™ injectable treatment courses across all markets.
Indicated Cases
This formulation is appropriate for:
- Adult cats weighing 2.5 to 5 kg at treatment initiation
- Wet (effusive) FIP — abdominal effusion, pleural effusion
- Dry (non-effusive) FIP — granulomatous lesions, organ involvement
- Ocular FIP — uveitis, aqueous flare, chorioretinitis
- First-line treatment following new FIP diagnosis
- Cats selecting GS-441524 monotherapy rather than dual antiviral protocol
This Formulation Is Not the First Choice For
- Cats weighing under 2.5 kg — the 20mg/ml formulation is indicated for dosing precision
- Cats weighing over 5 kg — the 40mg/ml formulation avoids excessive injection volumes
- Cats presenting with neurological FIP — consider dual antiviral therapy with EIDD-1931 (CureFIP™ Dual Antiviral Oral Capsules) or the 30mg/ml + B12 formulation for additional systemic support
- Cases with confirmed GS-441524 resistance or relapse — the 40mg/ml formulation and dual antiviral protocol are indicated
Clinical Background
GS-441524 is a nucleoside analogue antiviral that inhibits feline coronavirus (FCoV/FIPV) replication. Following cellular uptake and phosphorylation to its active triphosphate metabolite (GS-443902), it acts as a substrate for the viral RNA-dependent RNA polymerase (RdRp). The 1'-cyano substitution causes steric clash following incorporation into nascent RNA chains, producing delayed chain termination and halting viral RNA synthesis.
First described as effective against FIP in Pedersen et al. (2019, Nature), GS-441524 has since been evaluated in multiple prospective randomised controlled trials and retrospective cohort studies. Published remission rates in completed treatment cohorts consistently range from 80 to 94% across wet, dry, and ocular presentations. The 30mg/ml concentration has the longest clinical track record of any concentration in the CureFIP™ range due to its position as the standard treatment formulation.
Concentration Selection Guide
| Concentration | Primary Indication |
|---|---|
| 20mg/ml | Cats under 2.5 kg · Kittens · Precision low-volume dosing |
| 30mg/ml (this product) | Cats 2.5–5 kg · All standard FIP presentations · First-line |
| 40mg/ml | Cats over 5 kg · High-dose protocols · Resistance · Relapse |
| 30mg/ml + B12 | Cats 2.5–5 kg with anaemia, neurological symptoms, or appetite loss |
Dual Antiviral Option
If your cat has previously been treated with GS-441524 and relapsed, or if your veterinarian suspects early resistance, consider Basmi FIP™ Dual Antiviral Oral Capsules (GS-441524 + EIDD-1931). Combining two antivirals with distinct mechanisms of action — RdRp chain termination and lethal mutagenesis — creates a dual barrier against viral resistance that monotherapy cannot provide.
Administration
Administer subcutaneously once daily. Dose is calculated in mg of GS-441524 per kg of body weight. Standard treatment duration is 84 consecutive days without interruption. Weigh your cat weekly and recalculate dose if weight changes by more than 10%. Use the dosing calculator to determine the correct injection volume for your cat's current weight.
Most cats show observable treatment response within the first 7 days — appetite improvement and fever reduction are the earliest indicators. Blood parameter normalisation typically follows over weeks 2–4. If no clinical response is observed within 7 days, contact our clinical support team.
Basmi FIP™ GS-441524 Antiviral Injectable | 30mg/ml
Basmi FIP Antiviral ready-to-use injections form
Concentration: 30 mg/ml
Quantity: 1 vial
Purity: 99.4%
Shelf Life: 1 Year, Vials must be stored at ROOM TEMPERATURE. Do not store the vials in the freezer or the cooler or temperature below 8 degree celsius or 46 degree Fahrenheit, which may result in precipitation of API or crystallization of API.
Reviews
When my 2-year-old domestic shorthair cat was diagnosed with wet FIP, I was distraught (I knew it was a fatal condition if left untreated). I got to know about BasmiFIP while searching for solutions on the internet. I am not exaggerating when I say it literally saved my cat's life. Before starting the injections, he had a swollen belly, was very lethargic and refused to eat. Now, it's been almost three weeks of injections. He's almost as active as before. Thank you BasmiFIP for saving KUTTU.
3 cats of mine were diagnosed with FIP , Within the first week, their energy levels increased, their appetites returned, and they became more active. Over time, I noticed a gradual reduction in symptoms like fluid buildup and fever. Overall, the medicine has been highly effective in controlling the disease and improving their quality of life. The cost of Basmi can be quite high ; overall Recommendation I highly recommend Basmi FIP for Treatment
My 1.2-year-old cat Oreo is undergoing GS treatment for wet FIP. He had symptoms like fluid buildup, lethargy, and poor appetite. Since starting the injections, he’s shown great improvement — eating better, moving more, and slowly returning to his normal self. I'm very grateful for this platform making the medicine accessible. Thank you for helping pets like Oreo.
Oreo means the world to me, and this treatment has given us real hope. Thank you for helping pets like him get a second chance!!!
Our pet was diagnosed with wet FIP for which GS treatmemt is started last week. Earlier he was not eating properly and was lethargic. He had 200ml fluid accumulated in his chest cavity. Later post starting GS doses he is now stable and showing improvement. We hope this continues and he gets cure post 84 days of treatment. We will definitely post his progress and status throughout.
Today on day 35 dose of 30 mg basmi injection, my cat had multiple issues initially jaundice then tick fever then fluid buildup in chest and abdomen swelling in the vital organs he stopped eating since 15-20 days or no more I used to force feed him after recieving first dose he started to smell food and tasted it and after 3 dose he started eating more and more right now the fluid buildup is gone he eats well and is active.