Pneumonia in cats is treated with antibiotics (for bacterial cases) or antifungal medications, along with supportive care that often includes oxygen therapy, nebulization, and a chest-clearing technique you can do at home. Most cats need hospitalization first, followed by weeks to months of oral medications and follow-up X-rays. The specific treatment depends on whether the pneumonia is bacterial, fungal, or caused by aspiration.
How Bacterial Pneumonia Is Treated
Bacterial pneumonia, the most common type in cats, calls for aggressive antibiotic therapy that starts broad and may be adjusted once a vet identifies the specific bacteria involved. Treatment typically begins in the hospital with intravenous antibiotics, then transitions to oral antibiotics at home once your cat stabilizes.
The at-home antibiotic course lasts several weeks at minimum. In severe or widespread cases, your cat may need oral antibiotics for several months. About two weeks after hospital discharge, your vet will take new chest X-rays to check progress. Antibiotics continue until those X-rays look normal, so don’t stop the medication early even if your cat seems better. Stopping too soon is one of the most common reasons pneumonia comes back.
Treating Fungal Pneumonia
Fungal pneumonia is less common but requires a very different approach and a much longer treatment timeline. The primary antifungal medication for most cats is fluconazole, taken orally twice daily. For straightforward fungal infections, this single drug can clear the infection, but treatment typically takes 6 to 12 months because fungal organisms are slow to eliminate. Your vet will monitor blood tests to confirm the fungal levels have dropped to zero before stopping treatment.
Cats with severe or widespread fungal infections often need a more intensive combination approach. This may involve an injectable antifungal given over 6 to 12 weeks in the hospital, sometimes combined with additional oral medications. Once the cat improves enough, treatment shifts to oral fluconazole alone for several more months. The total treatment window for serious fungal pneumonia can easily stretch past a year.
Aspiration Pneumonia
Aspiration pneumonia happens when a cat inhales food, liquid, or vomit into the lungs. Cats with swallowing difficulties, chronic vomiting, or those recovering from anesthesia are most at risk. The inhaled material triggers inflammation and introduces bacteria into the lungs, so treatment mirrors bacterial pneumonia: broad-spectrum antibiotics started immediately, often in a hospital setting.
The key difference with aspiration pneumonia is identifying and managing whatever caused the aspiration in the first place. If a swallowing disorder or chronic vomiting triggered the episode, your cat will aspirate again unless that underlying problem is addressed. Your vet will likely investigate the cause alongside treating the lung infection itself.
What Happens in the Hospital
Cats with moderate to severe pneumonia usually need at least a few days of hospitalization. The primary concern is making sure your cat can breathe. A normal resting breathing rate for cats falls between 15 and 30 breaths per minute. Cats arriving with rapid, labored breathing, blue-tinged gums, or oxygen saturation below 93% will be placed on supplemental oxygen right away.
Hospital care also includes intravenous fluids to prevent dehydration (sick cats often stop drinking), injectable antibiotics, and sometimes nebulization treatments to help loosen mucus in the airways. Cats that are too sick to eat on their own may need nutritional support through a feeding tube, since adequate nutrition is critical for fighting off infection.
Home Care After Discharge
Once your cat comes home, you become the primary caregiver. Beyond giving oral medications on schedule, there are two hands-on techniques that make a real difference in recovery.
Coupage
Coupage is a gentle chest-tapping technique that loosens mucus trapped in the lungs so your cat can cough it up. Cup your hand slightly and tap it rhythmically against different areas of your cat’s chest wall. Use one hand and keep the pressure light, firm enough to create a hollow sound but not hard enough to cause discomfort. Perform coupage at least four times a day, and allow your cat some light movement afterward to encourage coughing. Your vet can demonstrate the technique before discharge so you feel confident doing it.
Nebulization
Some vets recommend home nebulization, which involves having your cat breathe in a fine mist of sterile saline for about 10 minutes per session. The saline helps thin out thick mucus and has mild anti-inflammatory benefits in the airways, making it easier for the lungs to clear themselves. Sessions are typically done twice daily. You can use a small enclosed space like a carrier with a nebulizer directed into it, though your vet will walk you through the setup that works best for your cat.
Monitoring Your Cat’s Recovery
The single most useful thing you can do at home is count your cat’s breathing rate while it’s resting or sleeping. Watch the chest rise and fall for 30 seconds, then double that number. A rate consistently above 30 breaths per minute is abnormal and suggests the pneumonia isn’t improving or may be worsening. Track this number daily and share it with your vet at follow-up visits.
Other signs to watch for include a return of heavy or open-mouth breathing, loss of appetite, lethargy that isn’t improving over the first week home, or a worsening cough. Mild coughing is actually expected during recovery (especially after coupage), but a cough that becomes more frequent or produces colored discharge is a concern. Most cats show noticeable improvement within the first week of treatment, though full recovery takes considerably longer.
Follow-Up X-Rays and Treatment Length
Chest X-rays are the gold standard for tracking pneumonia recovery. Your vet will schedule the first follow-up X-ray roughly two weeks after discharge. Antibiotics or antifungals continue until the X-rays show clear lungs, not just until your cat looks and acts normal. Cats frequently feel better well before the infection is fully resolved, and cutting treatment short allows the remaining bacteria or fungi to rebound.
For straightforward bacterial pneumonia caught early, the total treatment course is often 4 to 6 weeks. Severe bacterial cases or any fungal pneumonia will take months. Plan on multiple vet visits during that stretch, each with new X-rays to confirm progress. The financial and time commitment is real, but pneumonia that isn’t fully treated can become chronic or fatal.