Feline Infectious Peritonitis (FIP) is a serious disease caused by a mutation of the feline coronavirus (FCoV). Not long ago, a diagnosis of FIP was considered fatal — but GS-441524, an antiviral compound, has transformed the outlook for affected cats.
Understanding the GS-441524 treatment timeline helps cat owners manage expectations, reduce anxiety, and recognize both encouraging signs and potential concerns along the way.
A typical course of treatment lasts 84 days (12 weeks), but recovery is a gradual process that differs slightly from cat to cat.
👉 Read more: Understanding FIP in Cats and How to Manage It
How GS-441524 Works — and Why Injections Come First
GS-441524 targets the virus’s ability to replicate inside cells. Early in treatment, most cats are still battling active infection and may have poor appetite, vomiting, or digestive issues.
Because of this, injections are preferred in the early stage — they ensure consistent absorption and faster improvement when symptoms are still visible. Once your cat is stable and eating well, oral capsules can safely replace injections for comfort and convenience.
💡 Switching to oral capsules isn’t because injections stop working — it’s a sign your cat is stable enough to absorb medicine reliably through the digestive system.
The GS-441524 Treatment Timeline: Week-by-Week
Let’s walk through what usually happens over the 12-week course.
Week 1: The Turning Point
Goal: Stop viral replication and stabilize your cat.
What to expect:
Many cats start showing improvement within 3–5 days.
Appetite may return, and fever begins to subside.
Energy levels rise slightly, but weakness or mild wobbliness may remain.
Weight gain is minimal yet noticeable by the end of the week.
Blood test focus: Monitor for reduced inflammation and improving organ function.
Weeks 2–3: Visible Improvement
Goal: Build strength and confirm steady response.
Typical changes:
Appetite and thirst normalize.
Cats start grooming and exploring again.
Effusions (fluid buildup in abdomen or chest) begin to reduce if present.
Digestive issues like diarrhea or vomiting often resolve.
Owner tip: Maintain consistent injection schedules and feeding routines.
At this point, your vet may suggest a follow-up blood test to check improvement in protein levels and inflammation markers.
Weeks 4–6: Stabilization and Progress
Goal: Maintain healing and monitor internal recovery.
Expected signs:
Weight gain continues steadily.
Bloodwork shows normalized globulin and albumin ratios.
Energy levels increase, and most cats behave normally again.
What to watch for:
Occasional fatigue is normal.
Avoid stopping treatment early, even if your cat seems “back to normal.”
Some cats may transition to oral capsules during this stage if:
Appetite and energy are fully stable,
No vomiting or diarrhea is present, and
Blood test results are trending positively.
Weeks 7–9: Continued Healing and Careful Monitoring
Goal: Support ongoing recovery and adjust as needed.
Typical progress:
Coat condition improves — shinier and thicker fur.
Steady weight gain and playful behavior.
Blood tests should show a healthy A/G ratio (albumin-to-globulin) above 0.6.
Possible issues:
Mild setbacks such as low appetite for a day or two.
If symptoms reappear or worsen, consult your vet promptly — dosage adjustments may be needed.
If your cat switched to oral GS-441524, this period is crucial for monitoring absorption and consistency. Any vomiting or digestive issues should be reported immediately.
Weeks 10–12: Completing Treatment
Goal: Achieve full viral suppression and prepare for post-treatment observation.
Expected state:
Stable body weight and activity levels.
Normal appetite and bowel habits.
Bloodwork within healthy reference ranges.
Important: The 84-day mark isn’t the finish line just yet — most vets recommend a 12-week observation period after completing treatment to ensure no relapse.
FIP Blood Test Monitoring Explained
Blood tests are essential in tracking your cat’s recovery and adjusting treatment as needed.
Common Tests Include:
Testing Intervals
Baseline: Before or at the start of treatment.
Midpoint: Around weeks 4 and 8.
End of treatment: Week 12.
Post-treatment check: at the 4th, 8th and 12th week after stopping medication.
Common Concerns During GS-441524 Treatment
Plateaus: Some cats improve quickly, then seem to stall — this is normal.
Slow responders: FIP strain or concurrent infections can delay progress.
Temporary regressions: Stress, diet changes, or minor infections can cause mild setbacks.
Consistency, proper dosing, and close communication with your vet are key to overcoming these hurdles.
Final Thoughts: Patience, Monitoring, and Hope
GS-441524 treatment has turned FIP from a hopeless diagnosis into a condition many cats now survive and thrive from. The 12-week journey requires commitment, but seeing your cat’s health return — step by step — makes every injection, capsule, and blood test worthwhile.
Stay consistent, keep records of your cat’s weight and behavior, and work closely with your vet or treatment support team. Each small improvement means the medicine is doing its job — and your cat is on the path back to a healthy, happy life.
If you are unsure about treatment decisions or need case-specific guidance, you can request a FREE consultation with our team through:
Website: basmifip.com
WhatsApp: +60 11-5627 4308
Instagram: basmifipFacebook: BasmiFIP Malaysia
Early guidance helps you move forward with clarity, confidence, and care for your cat.
Frequently Asked Questions (FAQs)
1. How long does GS-441524 treatment last?
Usually 84 days (12 weeks), followed by a 12-week observation period.
2. When can I switch my cat from injections to oral capsules?
Typically after 2–4 weeks of stable improvement with no digestive issues.
3. What blood test results show recovery?
Rising A/G ratio, normal CBC, and stable liver/kidney values are strong signs.
4. Can I stop treatment early if my cat looks healthy?
No — stopping early increases the risk of relapse. Always complete the full course.
5. What if my cat misses a dose?
Give the next dose as soon as possible, but never double dose. Notify your vet if more than one dose is missed.
6. Is GS-441524 safe long-term?
Yes, when given correctly under veterinary guidance, most cats tolerate it very well.
