FIP Blood Test Results During Treatment: What Every Indian Cat Parent Needs to Know

The lab report arrives on your phone. Your cat has been on treatment for three weeks. They are eating again — a little at first, then more every day. They climbed onto your lap last evening for the first time since the diagnosis. Every sign you can see with your own eyes says the treatment is working.

Then you open the blood report. And everything looks wrong.

Globulin: still alarmingly high. ALT: higher than the last test. White blood cell count: flagged outside the normal range. You call your vet. You post the report in every FIP India group you can find. You click the Live Chat button at the bottom right of the page because you need an answer right now.

FIP Blood Test Results During Treatment India Guide

Here is what most Indian cat parents find out only after weeks of unnecessary panic: the majority of those abnormal values during active Feline Infectious Peritonitis (FIP) treatment are not a sign that the treatment is failing. They are precisely what happens inside the body of a cat who is responding normally to GS-441524.

In India, where FIP is still poorly understood in many veterinary clinics outside major cities, and where misdiagnosis remains common, knowing how to read these numbers yourself is not optional — it is part of how you protect your cat.

This article explains every key blood parameter, what it does during the 84-day treatment course, when an abnormal value is expected, and when it genuinely needs urgent attention.

Why Blood Tests Are the Most Critical Tool Throughout FIP Treatment

Feline Infectious Peritonitis (FIP) develops when the harmless feline coronavirus mutates into a form that attacks the cat's own immune system. GS-441524 works by stopping the virus from replicating — but the damage already done to proteins, organs, and immune cells takes weeks to reverse. Blood tests are the only way to track that reversal objectively, especially during the early weeks when what you observe externally may not yet match what is happening internally.

In India, where specialist veterinary experience in FIP is still developing in many cities beyond Mumbai, Delhi, Bengaluru, Chennai, and Pune — and where diagnostic tools like the Rivalta test or FIP-specific PCR may not be available at every clinic — the routine blood panel becomes your most reliable window into your cat's progress.

Blood work during FIP treatment does three things:

• Confirms the disease is actually retreating — inflammatory proteins falling, albumin recovering, immune markers stabilising

• Catches side effects before they become visible — particularly liver and kidney stress

• Guides dose corrections — if progress is slow, the numbers tell you and the treatment team whether an adjustment is needed

The standard monitoring schedule is a baseline panel before treatment starts, checks at weeks 4 and 8, and a final panel at day 84. The post-treatment observation period then requires additional blood checks at weeks 4, 8, and 12.

The trend across multiple draws over time matters far more than any single result in isolation.

Understanding Each Blood Parameter During FIP Treatment

Globulin

What it is: Globulins are immune proteins the body produces in response to infection. In cats with active Feline Infectious Peritonitis (FIP), globulin levels are almost always significantly elevated — often between 50 and 90 g/L — because the immune system has been locked in a sustained high-alert state.

What to expect during treatment: Globulin is consistently the last value to normalize. It is completely normal for it to remain elevated at the week-4 and week-8 draws, even in cats who are visibly recovering in every clinical way that matters. The number that counts is not the absolute level — it is whether that level is trending downward.

When to be concerned: Globulin that continues rising after week 8, alongside other signs of clinical deterioration, may mean the current dose is not adequately suppressing the virus. This is a conversation to have with the BasmiFIP India team — not a reason to stop treatment without guidance.

Albumin-to-Globulin Ratio (A:G Ratio)

What it is: The A:G ratio compares albumin — a structural protein the liver produces — to total globulins. In a healthy cat, this ratio sits above 0.8. In cats with active Feline Infectious Peritonitis (FIP), it commonly falls below 0.5, sometimes as low as 0.3.

What to expect during treatment: A rising A:G ratio is one of the earliest and most reliable signs that GS-441524 is working. As globulins start to fall and albumin begins recovering, this ratio climbs back toward normal. A rising A:G ratio at the week-4 draw — even when individual values are still outside the reference range — is a meaningful, concrete positive signal.

How to use it alongside individual values: A cat whose globulins fell from 70 g/L to 53 g/L while albumin rose from 14 g/L to 20 g/L is responding well — even though neither number has crossed back into the healthy reference range. The A:G ratio captures that progress where individual values still do not show it clearly.

ALT (Alanine Aminotransferase)

What it is: ALT is a liver enzyme that rises when hepatic cells are under stress or damaged. In FIP cats, elevated ALT can come from the disease itself, or from GS-441524 — which is documented as a cause of moderate, typically transient ALT elevation in a portion of treated cats.

What to expect during treatment: A moderate ALT rise in the first four to eight weeks of GS-441524 therapy is a well-documented finding. It does not indicate liver failure. It does not mean the treatment should be stopped.

When to act: An ALT that climbs to more than three to five times the upper limit of the reference range, or that keeps rising after week 8, needs closer evaluation. If your cat also develops jaundice — yellowing of the gums, the whites of the eyes, or the skin inside the ears — contact your vet or click the Live Chat button at the bottom right of the page the same day.

Never stop treatment based on ALT alone without professional guidance. Stopping GS-441524 prematurely significantly raises the risk of relapse — a risk that in the vast majority of cases is far greater than the risk posed by a moderate, monitored enzyme elevation.

ALP (Alkaline Phosphatase)

What it is: ALP is another liver-associated enzyme, commonly elevated alongside ALT during Feline Infectious Peritonitis (FIP) treatment.

What to expect: Mild ALP elevation during the treatment course is common and typically resolves on its own during or after treatment. Persistently elevated ALP after confirmed remission warrants a specific hepatic follow-up with a veterinarian.

SDMA and Creatinine (Kidney Function)

What they are: SDMA (symmetric dimethylarginine) and creatinine measure how efficiently the kidneys are filtering waste from the bloodstream. SDMA is a more sensitive, earlier indicator — it can detect reduced kidney function before creatinine rises.

What to expect during treatment: Some cats show transient SDMA elevations during GS-441524 therapy. GS-441524 is eliminated through the kidneys, and certain functional shifts can happen without causing lasting structural damage.

When to act: SDMA rising alongside elevated creatinine, dilute urine, or noticeably increased water intake requires veterinary evaluation. Cats with pre-existing kidney disease need more frequent renal monitoring throughout the full 84 days of treatment.

Complete Blood Count (CBC): White Cells and Differential

What it is: The total white blood cell count and the breakdown of individual populations — neutrophils, lymphocytes, eosinophils, monocytes.

What to expect during treatment:

• Lymphocytosis (elevated lymphocytes) has been documented during GS-441524 treatment and is generally not clinically significant when seen in isolation

• Eosinophilia (elevated eosinophils) is a known transient finding and does not by itself indicate parasites or allergic disease, unless accompanied by other signs

• Neutrophilia (elevated neutrophils) early in treatment reflects the active systemic inflammation of Feline Infectious Peritonitis (FIP) itself — this should gradually decrease as treatment takes effect

A CBC trending toward the reference range between weeks 4 and 8 is encouraging. Persistent or worsening neutrophilia — particularly if your cat is also running a fever or refusing food — may indicate a secondary bacterial infection or insufficient viral control at the current dose.

Hematocrit (PCV) and Red Blood Cells

What it is: The proportion of red blood cells in circulation. Many cats with Feline Infectious Peritonitis (FIP) are anaemic at diagnosis, due to immune-mediated destruction of red blood cells and bone marrow suppression.

What to expect: Anaemia improves progressively as the viral load decreases and the immune system stabilises. Full normalization in the first two to four weeks of treatment is not realistic. Cats still severely anaemic beyond week 8 may need a supportive care discussion with the treating veterinarian.

Total Protein and Fibrinogen

What they are: Total protein is albumin plus globulins. Fibrinogen is an acute-phase inflammatory protein that spikes significantly during active systemic inflammation.

What to expect: Total protein normalises as albumin climbs and globulins fall. Very high starting values — above 90–100 g/L — are consistent with active Feline Infectious Peritonitis (FIP). A sustained downward trend across the 84-day course is what to watch for.

Reading the Blood Report Week by Week

Before Treatment Starts (Baseline Panel)

This panel captures the severity of the disease at the starting point. Expect elevated globulins, low albumin, a depressed A:G ratio, possible anaemia, and disrupted inflammatory markers. Every subsequent result is compared to this baseline — not to the healthy reference range of a normal cat. This distinction is important and is one of the most common sources of confusion for Indian pet parents interpreting results.

Week 4 (Day 28)

Cats responding to treatment typically show at this draw:

• A:G ratio improving, even if individual values remain outside reference limits

• Globulins lower than baseline, even if still substantially elevated

• CBC moving toward normal ranges

• Partial improvement in anaemia

• ALT possibly elevated but stable — not continuing to climb

If globulins have not moved and clinical signs have not improved, verify the current dose against your cat's actual current body weight. Use the BasmiFIP India FAQ page to check dosage guidance, or click the Live Chat button at the bottom right of the page to discuss the panel results with the treatment team before drawing conclusions about treatment failure.

Week 8 (Day 56)

A well-responding cat at week 8 should show values clearly approaching the reference range. Globulins should be measurably lower than at week 4. ALT and ALP, if elevated, should be stable or declining. Albumin should show a clear upward recovery trend.

If values at week 8 are still moving in the wrong direction, do not adjust the dose or stop treatment on your own. Click the Live Chat button at the bottom right of the page and share the complete panel results with the BasmiFIP India team for guidance.

Day 84 (End of Treatment)

The goal at day 84 is clinical remission with a clear trend toward laboratory normalisation — not necessarily perfect numbers across every parameter. Globulins in particular may still be slightly above the reference range. The criteria for concluding treatment are:

• Clinical remission: normal appetite, stable or increasing weight, normal activity level, normal body temperature

• A:G ratio at or approaching the reference range

• No active fluid accumulations

• No other markers of ongoing active disease

For a detailed overview of what to expect at each stage, see the FIP treatment guidelines on the BasmiFIP India website.

Post-Treatment Observation: Weeks 4, 8, and 12 After Day 84

The 12-week observation period is a structured phase with its own blood monitoring requirements. At each checkpoint, values should continue normalising. Any parameter moving in the wrong direction after treatment ends — particularly globulins rising again, or albumin falling — must be reported immediately. This pattern can indicate relapse. BasmiFIP India offers treatment for relapsed cases at 50% of the regular price within 12 months — so early detection and fast action directly affects both your cat's outcome and your costs.

The Most Common Misreads — And the Facts Behind Them

"ALT has gone up. Should I stop the medication?" In most cases, no. Moderate ALT elevation during GS-441524 therapy is an expected, documented side effect that generally resolves on its own. Stopping treatment prematurely dramatically increases relapse risk. This is one of the most avoidable reasons FIP treatment fails in India. Consult the BasmiFIP team before making any changes.

"The blood report looks almost normal at week 4. Can we stop early?" No. Normalised lab values do not mean the virus has been eliminated. The 84-day protocol exists because feline coronavirus can persist inside macrophages — immune cells — even when blood markers improve. Stopping early is the single most common cause of preventable relapse.

"Week 4 results haven't improved. The treatment isn't working." Clinical improvement — returning appetite, reduced fever, increased energy — almost always precedes laboratory normalisation by two to four weeks. If your cat looks and acts better but the blood work is still elevated, the treatment is very likely working. Evaluate both the clinical picture and the numbers together before drawing conclusions.

"Globulins are still high at week 8. Something must be wrong." Globulin is the last parameter to normalise in virtually every successfully treated FIP case. Many cats still have elevated globulins at week 8 while heading toward full remission. A consistent downward trend — even a slow one — is the signal to focus on.

FAQ: FIP Blood Tests During Treatment in India

What blood tests are needed to monitor FIP treatment in India?

A complete chemistry panel — total protein, albumin, globulins, ALT, ALP, creatinine, SDMA — plus a full blood count (CBC) with differential. The A:G ratio is calculated from albumin and globulins. Recommended minimum testing points: baseline before starting, week 4, week 8, and day 84 at end of treatment. Most veterinary diagnostic labs in India — including branches of Heska, Idexx, and local veterinary hospital labs — can run this panel.

What do high globulins mean in a cat with FIP during treatment?

Elevated globulins during Feline Infectious Peritonitis (FIP) treatment reflect sustained immune system activation caused by the feline coronavirus. This is expected during the early and middle phases of GS-441524 therapy. A consistently declining trend — even when values remain above the reference range — is a positive indicator of treatment response.

Is it normal for ALT to rise during GS-441524 treatment?

Yes. Moderate ALT elevation is a documented, typically transient side effect of GS-441524. It does not automatically indicate liver damage or treatment failure. Regular monitoring is essential; a significant or sustained rise should be discussed with a veterinarian or the BasmiFIP India team before any treatment changes are made.

What is the A:G ratio and why is it important for FIP?

The albumin-to-globulin ratio (A:G ratio) compares two protein fractions in the blood. In healthy cats it typically sits above 0.8. In cats with active Feline Infectious Peritonitis (FIP) it often falls below 0.5. A rising A:G ratio during treatment is one of the earliest and most reliable signs that GS-441524 is working.

How often should blood tests be done during the 84-day FIP treatment?

Minimum recommended schedule: baseline before starting, week 4, week 8, and day 84 at end of treatment. After treatment, blood checks at weeks 4, 8, and 12 of the observation period confirm sustained remission.

Can blood work look normal but my cat still relapse?

Yes. Lab values can normalise before the virus is fully eliminated. This is one of the primary reasons both the complete 84-day treatment course and the full 12-week post-treatment observation period are necessary — regardless of how good the results appear at any point.

My cat's blood results got worse at week 4. What do I do?

Click the Live Chat button at the bottom right of the page and share the full panel results with the BasmiFIP India team immediately. Deteriorating values at week 4 may indicate the dose is too low for your cat's current body weight, a product absorption issue, or a form of FIP requiring a higher-dose protocol. Do not adjust the dose or stop treatment on your own.

What happens to SDMA during FIP treatment?

Transient SDMA elevation has been documented in some cats during GS-441524 therapy and does not necessarily indicate permanent kidney damage. Cats with pre-existing kidney disease require more frequent renal monitoring. SDMA that remains elevated or continues rising after treatment ends warrants further veterinary investigation.

My vet in India is not familiar with FIP. How do I use the blood results to guide them?

This is one of the most common situations faced by Indian cat parents, particularly outside metro cities. The most effective approach is to bring the complete chronological history of every blood panel — from baseline onward — to every vet consultation. Trends across multiple draws are far more informative than a single result. BasmiFIP India's treatment team can work directly with you and your vet through the Live Chat button at the bottom right of the page, helping to interpret results and recommend next steps. Free consultation is available for all active treatment cases.

Where can I get blood tests done for my cat in India?

Veterinary diagnostic services are available at most multi-specialty animal hospitals in Mumbai, Delhi, Bengaluru, Chennai, Pune, Hyderabad, Kolkata, Ahmedabad, and other major cities. In smaller cities or towns, your nearest veterinary college hospital often offers complete blood panel services. If you need guidance on which specific tests to request, click the Live Chat button at the bottom right of the page and the BasmiFIP India team will help you.

Keep Every Report. Track Every Change.

Monitoring blood work throughout Feline Infectious Peritonitis (FIP) treatment is not just about catching problems — it is how you confirm, with objective data, that the treatment is working. For many Indian cat parents, the moment when the A:G ratio first starts rising, or when globulins drop visibly from one report to the next, is the first real confirmation that their cat has a genuine chance of recovery.

Save every lab report. Keep a simple table — even a note on your phone — logging the key values at each draw: globulins, albumin, A:G ratio, ALT, and hematocrit. When you share results with the BasmiFIP India team or your vet, share the full history from baseline onward. Trends tell the story that a single snapshot cannot.

If any warning signs return after treatment ends — recurring fever, loss of appetite, unexplained weight loss, abdominal swelling, eye changes, or neurological symptoms — do not wait for the next scheduled appointment. Click the Live Chatbutton at the bottom right of the page immediately. The BasmiFIP India team is available to help you respond quickly and correctly.

BasmiFIP India delivers from Mumbai to your doorstep across the country — via Blue Dart, Xpressbees, and Porter — with no customs delays and no import taxes. Treatment access should never be the barrier standing between your cat and recovery. Our 92.7% treatment success rate is built on consistent treatment, correct dosing, and informed monitoring — the combination this guide is designed to support.