# Prednisolone for Cats With IBD, Asthma, or Kidney Disease Prednisone for cats with IBD is not a one-size-fits-all drug. The same steroid that calms an inflamed intestine is also used to open airways in asthma, to ease some kidney problems, and as part of lymphoma treatment, but the dose, the form of the drug, and the monitoring all change with the diagnosis. Your veterinarian decides which version and which dose your cat needs based on the specific disease and your cat's overall health. This article is educational and is not a substitute for veterinary diagnosis or treatment. ## Quick Answer - Prednisolone is the form of the steroid that works best in cats, and many veterinarians prescribe it instead of prednisone because cats convert prednisone to prednisolone poorly. - The dose is always calculated by your veterinarian from your cat's weight and condition, and it is usually tapered slowly instead of stopped suddenly. - Cats with IBD often need a higher starting dose that is reduced over weeks, while cats with asthma may need only a low dose or an inhaled option. - Steroids can raise blood sugar, increase thirst and urination, and change liver values, so routine bloodwork matters. - Never give your cat a steroid prescribed for a person or another pet, and never adjust the dose on your own. ## What Prednisolone and Prednisone Are and What Veterinarians Use Them For Prednisolone and prednisone are corticosteroids, a class of drugs that mimic the natural cortisol your cat's body makes. They reduce inflammation and suppress parts of the immune system. In cats, prednisolone is the preferred form because the liver converts prednisone into prednisolone, and cats do this less efficiently than dogs or people. That is why you will often see a prescription written for prednisolone even when the conversation started with prednisone for cats with IBD. Veterinarians use these drugs for several different problems in cats: - **Inflammatory bowel disease (IBD).** Steroids calm the immune reaction in the intestinal wall that causes chronic vomiting, diarrhea, and weight loss. - **Asthma and chronic bronchitis.** Steroids reduce airway inflammation so breathing is easier. Bronchial asthma in cats looks a lot like asthma in people, with coughing, wheezing, and shortness of breath that may come and go [1]. Young cats and Siamese and Himalayan breeds are most often affected, and sudden asthma in an older cat is uncommon [1]. - **Kidney disease.** Steroids are not a standard treatment for chronic kidney disease itself, but they may be used when an immune-mediated kidney problem or another inflammatory condition is involved. Your veterinarian will weigh the risks carefully because steroids can increase thirst and urination, which is already a concern in kidney patients. - **Lymphoma.** Lymphoma is the most common cancer in cats, and prednisolone is a common part of chemotherapy protocols [2]. In one study of cats with intermediate- to large-cell lymphoma, prednisolone was given alongside lomustine, and responses ranged from complete to progressive disease [2]. Alimentary lymphoma, the type that affects the gut, is the most common form [2]. If your cat has IBD, you may also want to read about [how diet trials compare with steroid protocols](/knowledge/veterinary-medicine/internal-medicine/inflammatory-bowel-disease-ibd-in-cats-diet-trial-vs-steroid-protocol), since food and medication often work together. ## How It Works in a Cat's Body When your cat swallows a prednisolone tablet, the drug is absorbed into the bloodstream and travels throughout the body. It binds to receptors inside cells and changes how those cells behave. In simple terms, it turns down the volume on inflammation and on some immune reactions. In IBD, that means less immune activity in the gut lining, which can reduce the cycle of irritation, poor absorption, and diarrhea. In asthma, it means less swelling and mucus in the small airways, so your cat can move air more easily. In lymphoma, steroids can directly slow the growth of some cancer cells and make your cat feel better, even when they are not curing the disease. The drug does not fix the underlying cause. It controls the symptoms and the inflammation while your veterinarian looks for the trigger or manages the disease long term. ## Dosing Basics for Prednisone for Cats With IBD and Other Conditions ### Who decides the dose Your veterinarian does. There is no safe dose you can figure out at home. The dose depends on your cat's weight, the diagnosis, how severe the problem is, and whether your cat has other conditions like diabetes or heart disease. A cat with IBD may start on a higher anti-inflammatory or immunosuppressive dose and then taper down over weeks or months. A cat with asthma may need a much lower dose, or may do well with an inhaler instead of pills. For reference, one small study of healthy cats used oral prednisolone at 1.1 to 1.5 mg/kg once daily for 7 days to look at liver and bile acid effects [3]. That is a research dose, not a treatment recommendation for your cat. Your veterinarian will choose the number that fits your cat. ### How it is given Prednisolone comes as tablets, as a liquid, and sometimes as an injection in the hospital. Tablets are usually given with food to reduce stomach upset. Some cats take them easily in a pill pocket or a small piece of food. Others need a pill popper or a compounded flavored liquid. If your cat is hard to medicate, ask your veterinarian about a transdermal gel or a liquid form. Do not crush or split a tablet unless your veterinarian says it is safe. Some formulations are coated or extended release, and crushing them can change how the drug is absorbed. ### What to do about a missed dose If you miss a dose, give it as soon as you remember, unless it is almost time for the next one. In that case, skip the missed dose and go back to your regular schedule. Never double up to make up for a missed pill. If you are not sure what to do, call your veterinarian or an emergency clinic. ### Never stop suddenly Steroids suppress the adrenal glands over time. If you stop them abruptly, your cat can become very ill. Always follow the tapering plan your veterinarian gives you, even if your cat seems completely normal. ## Common and Serious Side Effects | Side effect | How common or serious | What to do | |---|---|---| | Increased thirst and urination | Very common, usually mild | Keep fresh water available and expect more litter box trips. Tell your veterinarian if it is extreme. | | Increased appetite and weight gain | Common | Measure food and avoid free feeding. Ask about a weight plan. | | Panting or restlessness | Common in some cats | Note how often it happens and mention it at the next visit. | | Vomiting or diarrhea | Uncommon, usually mild | Give with food. Call your veterinarian if it continues. | | High blood sugar | Can happen, more likely with long-term use | Your veterinarian may check bloodwork. Watch for excessive drinking and urination. | | Liver enzyme changes | Common and often mild | One study found that AST, ALT, and ALP activities actually decreased during prednisolone treatment in healthy cats [3]. Routine bloodwork still matters. | | Increased bile acids | Measured in one study, but stayed below abnormal levels [3] | Your veterinarian may monitor liver values if your cat has liver disease. | | Infection risk | More likely with high or long-term doses | Call your veterinarian if your cat seems lethargic, has a fever, or is not eating. | | Diabetes | Serious, more likely in cats already at risk | Report heavy drinking, huge urine volumes, or weight loss right away. | | Heart failure from fluid retention | Rare but serious | Seek emergency care for trouble breathing or a swollen belly. | If your cat has allergies and you are using steroids for itching, see [cat prednisolone for allergies](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-prednisolone-allergies) for a focused look at that use. ## Who Should Not Take It and Drug Interactions Prednisolone is not right for every cat. Your veterinarian may avoid it or use it with extreme caution if your cat has: - Uncontrolled diabetes - Active serious infection, especially fungal infections - Heart failure - Severe kidney disease, unless the benefit clearly outweighs the risk - A history of stomach ulcers - Glaucoma or certain eye conditions Tell your veterinarian about every medication, supplement, and herbal product your cat takes. Steroids can interact with: - Nonsteroidal anti-inflammatory drugs (NSAIDs), which raise the risk of stomach ulcers - Diabetes medications, because steroids raise blood sugar - Diuretics, which can worsen potassium loss - Certain antibiotics and antifungals - Vaccines, because steroids can weaken the immune response Do not give your cat any human steroid product, including creams, without asking your veterinarian first. Cats groom themselves, so a steroid cream on your skin can be licked off and swallowed. ## Overdose and When to Call a Veterinarian or Poison Control A single large dose of prednisolone is rarely fatal in cats, but it can cause vomiting, diarrhea, restlessness, and a racing heart. If you think your cat ate several tablets, call your veterinarian or an animal poison control hotline right away. Have the bottle with you so you can read the strength and the number of pills missing. If your cat is collapsing, having a seizure, breathing hard, or cannot stand, go to an emergency clinic immediately. Do not wait for a callback. For long-term use, the bigger risk is not one big dose but the slow buildup of side effects. Keep every recheck appointment and every blood test. Your veterinarian needs those numbers to adjust the dose safely. ## Limitations and When to Contact a Veterinarian No article can tell you the right dose for your cat. Every cat is different, and the same drug that helps one cat can harm another. Your veterinarian needs to examine your cat, run bloodwork, and follow the response over time. **Call the same day if:** - Your cat vomits the dose or you cannot get the pill in - Your cat refuses to eat for more than 24 hours - You see new weakness, wobbliness, or confusion - Your cat drinks far more than usual or urinates outside the box - You notice black or tarry stool **Go to an emergency clinic now if:** - Your cat is struggling to breathe or breathing with an open mouth - Your cat collapses or has a seizure - Your cat's gums look pale, blue, or gray - Your cat has a swollen belly and seems painful **Bring up at a routine visit:** - Weight changes - Appetite changes - Litter box habits - Any new coughing, sneezing, or eye discharge - Whether the dose can be lowered If your cat has kidney disease, diet matters as much as medication. See [what cat food is best for kidney disease](/knowledge/veterinary-medicine/nutrition/what-cat-food-is-best-for-kidney-disease) for guidance you can discuss with your veterinarian. ## Frequently Asked Questions ### Is prednisone or prednisolone better for a cat with IBD? Prednisolone is generally preferred in cats because their liver converts prednisone to prednisolone poorly. Many veterinarians prescribe prednisolone directly so the active drug reaches the body without that conversion step. If your bottle says prednisone, ask your veterinarian whether a switch makes sense. ### How long does it take for prednisolone to help a cat with IBD? Some cats improve within a few days, while others need one to two weeks before you see a clear change in vomiting, diarrhea, or appetite. Your veterinarian will usually plan a recheck to judge the response and adjust the dose. Do not stop the drug early just because your cat seems better. ### Can prednisolone cure my cat's asthma? Prednisolone controls airway inflammation but does not cure asthma. Many cats need long-term management, and some do well with a lower dose or an inhaled steroid over time. Your veterinarian will decide how often to recheck and whether the dose can be reduced. ### Is prednisolone safe for a cat with kidney disease? It depends on the cause of the kidney problem and how advanced it is. Steroids can increase thirst and urination, which is already a burden in kidney disease, so veterinarians use them only when the benefit is clear. Never start or stop a steroid for a kidney cat without veterinary guidance. ### Can prednisolone be used for lymphoma in cats? Yes, prednisolone is commonly used as part of lymphoma treatment, often alongside chemotherapy drugs. In one study, cats with intermediate- to large-cell lymphoma received lomustine and prednisolone as first-line therapy, and responses varied from complete response to progressive disease [2]. Your veterinarian will discuss the goals of treatment and what to expect. ### What if I miss a dose or my cat spits out the pill? Give the missed dose when you remember unless it is nearly time for the next one, then skip it and continue on schedule. Never give two doses at once. If your cat keeps spitting out pills, ask your veterinarian about a liquid, a flavored chew, or a transdermal form. ### Can I stop prednisolone once my cat feels better? No. Steroids must be tapered slowly under veterinary direction because the adrenal glands need time to restart natural cortisol production. Stopping suddenly can cause a life-threatening crisis. Follow the written taper plan exactly, and call your veterinarian if you are unsure about the next step. ## Related Articles - [Prednisolone for Cats: Feline Safe Steroid Dose and Autoimmune](/knowledge/veterinary-medicine/calculators-clinical-tools/prednisolone-for-cats-feline-safe-steroid-dose-and-autoimmune) - [Inflammatory Bowel Disease IBD in Cats: Diet Trial vs Steroid Protocol](/knowledge/veterinary-medicine/internal-medicine/inflammatory-bowel-disease-ibd-in-cats-diet-trial-vs-steroid-protocol) - [Cat Prednisolone for Allergies: Side Effects and Safe Use](/knowledge/veterinary-medicine/skin-allergy-and-ear-care/cat-prednisolone-allergies) - [Corticosteroid Therapy in Feline Inflammatory Bowel Disease: Dosing and Monitoring](/knowledge/veterinary-medicine/clinical-pharmacology/corticosteroid-therapy-feline-ibd) - [What Cat Food Is Best For Kidney Disease](/knowledge/veterinary-medicine/nutrition/what-cat-food-is-best-for-kidney-disease) - [IBD Diet for Cats: Hydrolyzed Novel Protein and B12 Injections](/knowledge/veterinary-medicine/nutrition/ibd-diet-for-cats-hydrolyzed-novel-protein-and-b12-injections) - [Prednisolone for Cats: Uses, Doses, and Cancer Care](/knowledge/veterinary-medicine/pet-medication-guide/prednisolone-cats-uses-dosage-cancer) - [Prednisolone Dosage for Cats: By Weight and Condition](/knowledge/veterinary-medicine/pet-medication-guide/prednisolone-dosage-chart-cats) - [Prednisolone for Cats: Liquid vs Injection vs Tablet Forms](/knowledge/veterinary-medicine/pet-medication-guide/prednisolone-cats-liquid-injection) ## References 1. [Tracheobronchitis (Bronchitis, Bronchial Asthma) in Cats - Cat Owners](https://www.merckvetmanual.com/cat-owners/lung-and-airway-disorders-of-cats/tracheobronchitis-bronchitis-bronchial-asthma-in-cats). Merck Veterinary Manual. 2. [A Retrospective Investigation of 28 Cats with Intermediate- to Large-Cell Lymphoma Treated with Lomustine and Prednisolone as a First-Line Chemotherapy](https://pubmed.ncbi.nlm.nih.gov/41897966/). Animals : an open access journal from MDPI, 2026. 3. [Influence of Prednisolone Treatment on Serum Bile Acid Concentrations in Cats](https://pubmed.ncbi.nlm.nih.gov/41150073/). Veterinary sciences, 2025. ## Further Reading - [Bronchitis in Cats - Cat Owners (Merck Veterinary Manual)](https://www.merckvetmanual.com/cat-owners/lung-and-airway-disorders-of-cats/bronchitis-in-cats) - [American Veterinary Medical Association: First Aid Tips for Pet Owners](https://www.avma.org/resources-tools/pet-owners/emergencycare/first-aid-tips-pet-owners) - [Merck Veterinary Manual: Cat Owners](https://www.merckvetmanual.com/cat-owners)