Meloxicam Uses: Dosing and Safety in Dogs and Cats

By Dr. Zubair Khalid, DVM, MS, PhD · 2026-09-20

Meloxicam is a prescription nonsteroidal anti-inflammatory drug (NSAID) given to dogs and cats to relieve pain, reduce fever, and control inflammation. It belongs to the oxicam family and is described in the veterinary pharmacology literature as a preferential inhibitor of cyclooxygenase-2 (COX-2), the enzyme isoform induced during inflammation [1]. In dogs, meloxicam is used for acute and chronic pain, including postoperative pain and the pain of degenerative joint disease [2]. In cats, the approved label use is narrower and the safety margin is smaller, so the drug is typically given as a single injection or a short oral course rather than an open-ended daily regimen [3][4]. This article is educational and is not a substitute for veterinary diagnosis or treatment.

The single most important practical fact about meloxicam uses is that the dose and the duration are not the same in dogs and cats. Cats clear the drug differently, are more prone to kidney and gastrointestinal injury, and have far less published long-term safety data than dogs. Any decision to give meloxicam, and for how long, belongs to a veterinarian who has examined the animal.

At a Glance

How Meloxicam Works

The COX-1 and COX-2 distinction

Every NSAID works by blocking cyclooxygenase, the enzyme that converts arachidonic acid into prostaglandins. Prostaglandins are local hormone-like molecules that produce pain, swelling, and fever at sites of injury, and they also perform housekeeping jobs in the stomach lining and the kidney. Two isoforms of cyclooxygenase have been identified. COX-1 is present at a fairly constant level in most tissues and produces prostaglandins that protect the stomach and support normal kidney blood flow. COX-2 is induced by inflammation and drives the production of pro-inflammatory prostaglandins [1].

The therapeutic benefit of an NSAID comes mainly from blocking COX-2. The classic side effects, especially stomach and kidney problems, have been linked to blocking COX-1 [1]. This is why drug companies design NSAIDs that lean toward COX-2. Meloxicam has been shown in multiple test systems to be a preferential inhibitor of COX-2, meaning it blocks COX-2 more than COX-1 but does not ignore COX-1 entirely [1]. That last point matters. Preferential is not the same as selective. Meloxicam still carries real gastrointestinal and renal risk, and that risk rises when the patient is dehydrated, under anesthesia, or receiving other drugs that stress the kidney.

What happens after the drug is absorbed

Meloxicam is completely absorbed from the gastrointestinal tract in dogs and has an elimination half-life of about 24 hours in that species [1]. A separate pharmacokinetic study in healthy dogs given a single oral dose found a time to peak plasma concentration of 8.5 hours and an elimination half-life of about 12 hours [7]. A bioequivalence study comparing an oral disintegrating film with an oral suspension in beagle dogs reported mean elimination half-lives of 28.8 hours and 32.9 hours respectively [6]. These numbers differ because formulation, assay method, and study design differ, but they agree on the central clinical point: meloxicam stays in the body for a long time. A drug with a half-life measured in tens of hours does not need to be given repeatedly through the day, and it does not wash out quickly if a problem develops.

Meloxicam circulates mainly as the parent compound in the plasma of dogs and several other species [8]. It is metabolized in the liver and excreted in both feces and urine, and the metabolites found in urine are biologically inactive and do not affect prostaglandin synthesis in the kidney [1]. Protein binding is high, above 99 percent in rats and humans, which is typical for this drug class [8].

Labeled Uses in Dogs

Acute and postoperative pain

Meloxicam is widely used in dogs for surgical pain. In a study of beagle dogs undergoing ovariohysterectomy, meloxicam was combined with buprenorphine as multimodal analgesia, and the authors reported comparable postoperative sedation and pain scores across treatment groups [9]. The phrase multimodal matters. Modern veterinary pain management pairs an NSAID with an opioid or a local anesthetic block so that each drug works through a different mechanism. Meloxicam alone is not expected to control severe surgical pain.

Chronic musculoskeletal pain

Meloxicam is recommended for treating acute and chronic pain in dogs and is frequently administered prophylactically to reduce postoperative pain [2]. The chronic use case is degenerative joint disease, the canine equivalent of osteoarthritis. Here the drug is given on a scheduled basis, often daily or at the lowest effective interval, with periodic bloodwork to check the liver and kidneys. Because the half-life is long, some veterinarians dose every other day in stable patients, but that decision is individual and should not be made by an owner without direction.

What meloxicam does not do

Meloxicam is not an antibiotic. It does not treat infection. It is not a steroid and does not replace corticosteroids in immune-mediated disease. It does not reverse joint damage, and it does not cure arthritis. It reduces the pain and inflammation that make an arthritic dog reluctant to rise, climb stairs, or jump into a car. Owners often notice improved willingness to move before they notice any change in the physical exam, and that improvement is the point of treatment.

Labeled Uses in Cats

The approved indication is narrow

In cats, the approved injectable use is a single subcutaneous dose for the control of postoperative pain, and the oral form is approved for short-term continuation after that injection. The reason for the narrow label is safety. A clinical trial submitted to the FDA as part of a New Animal Drug Application linked injectable meloxicam to acute kidney injury in cats, and those data were omitted from the published version of the trial [4]. That history is why the feline label is restrictive and why many veterinarians will not dispense meloxicam to a cat for long-term home use without a specific reason and a monitoring plan.

Short courses are supported by clinical trials

Short courses have been studied. In 50 client-owned cats undergoing onychectomy and sterilization, three-day and five-day meloxicam protocols produced no difference in efficacy or safety, and no cat required rescue analgesia [3]. The cats that received meloxicam before surgery had better gait and lameness scores than those that received it afterward, which supports the principle of preemptive analgesia, meaning pain control started before the painful stimulus [3]. In a separate randomized trial of cats undergoing ovariohysterectomy, meloxicam at 0.2 mg/kg was compared with robenacoxib, and owners reported fewer abnormal behaviors and lower pain scores in the meloxicam group [10]. Both drugs controlled postoperative pain, and the authors noted that a blanket policy of sending every cat home with an NSAID may not be necessary [10].

Long-term use in cats is possible but requires care

Long-term feline use is not forbidden, but it sits outside the standard label and demands more caution. A prospective study followed 40 cats with osteoarthritis treated with oral meloxicam at 0.01 to 0.03 mg/kg once daily for a mean of 5.8 months. Gastrointestinal upset occurred in 2 of 46 cats (4 percent), no decline in renal function was detected, and owners rated efficacy as good or excellent in 34 of 40 cases (85 percent) [11]. That study is the main published support for low-dose chronic feline use, and it is important to read it precisely. The dose range is low, the drug was given with food, and the cats were monitored. A later dose-escalation study in cancer-bearing cats found that meloxicam at 0.02 mg/kg every 24 hours was safe and well tolerated when combined with toceranib phosphate over a 12-week period, with no cats withdrawn for adverse events from the combination [12].

The pattern across these studies is consistent. Low-dose, monitored, short-to-medium-term meloxicam can be used in cats. High-dose or unmonitored long-term use is where the danger lies.

How to Use Meloxicam

Follow the prescription exactly

Give meloxicam exactly as the veterinarian prescribed. Do not adjust the dose because the pet seems better or worse. Do not extend a short course into a long one. Do not give a second dose because the first one appeared to wear off. Because the half-life is long, the drug is still working when the owner thinks it has stopped.

Give it with food

Oral meloxicam should be given with food. In the long-term feline osteoarthritis study, the drug was administered with food, and the authors specifically described it as safe and palatable under those conditions [11]. Food reduces direct contact between the drug and the stomach lining and slows absorption slightly, which is generally desirable for an NSAID.

Timing around surgery

When meloxicam is used perioperatively, timing is deliberate. In the feline onychectomy study, preoperative dosing produced better gait and lameness scores than postoperative dosing [3]. If a veterinarian asks that the drug be given the night before or the morning of a procedure, that instruction reflects preemptive analgesia, not convenience.

Do not split doses between people

Meloxicam is also a human prescription drug. Veterinary and human products are not interchangeable, and human tablets are not dosed for a 10-pound cat. Use only the veterinary product dispensed for that animal.

What to do if a dose is missed

For a short postoperative course, call the veterinary clinic for instructions rather than doubling up. For a chronic arthritis patient, a missed dose is usually handled by giving the next scheduled dose at the normal time, but confirm this with the prescribing veterinarian, because the correct answer depends on how long the drug has been in use and how the patient is doing.

Side Effects and What to Do About Them

Gastrointestinal signs

The most common adverse effect is gastrointestinal upset. In the long-term feline study, GI upset occurred in 2 of 46 cats, about 4 percent [11]. In dogs, NSAIDs are frequently prescribed for their analgesic, antipyretic, and anti-inflammatory properties, and their beneficial actions can be offset by gastrointestinal toxicosis [13]. A study of gastrointestinal permeability in dogs receiving carprofen or meloxicam for more than seven days found that sucrose permeability in the meloxicam group did not change significantly over time, and there was no increase in intestinal permeability in either group [13]. That is reassuring for short-term use in healthy dogs, but it does not mean meloxicam is harmless. Permeability testing measures one aspect of gut integrity, and clinically significant ulceration can still occur, particularly in a dog that is also receiving a steroid, is stressed, or has pre-existing GI disease.

Signs to watch for include vomiting, diarrhea, black or tarry stool, reduced appetite, and abdominal pain. Black stool indicates digested blood and is an emergency. Stop the drug and call the veterinarian.

Kidney effects

The kidney is the second major concern. Prostaglandins help maintain blood flow within the kidney, and blocking them matters most when the patient is dehydrated, hypotensive, or already has kidney disease. The FDA submission data linking injectable meloxicam to acute kidney injury in cats is the clearest published warning about this risk in that species [4]. A cat that is not eating, not drinking, or has been vomiting is a poor candidate for any NSAID, including meloxicam.

Signs of kidney trouble are easy to miss early. Increased thirst, increased urination, lethargy, and reduced appetite are the classic early signs. Bloodwork before starting a long course, and again during it, is how veterinarians catch problems before they become irreversible.

Liver effects

NSAIDs are metabolized in the liver, and meloxicam is no exception. Meloxicam is metabolized by hepatic microsomal enzymes, and in dogs the rate of oxidative metabolism is slow enough that it could not be reliably measured in one in vitro study [14]. That slow hepatic clearance is one reason the drug persists so long in the body. Any dog or cat with known liver disease should be evaluated carefully before meloxicam is started.

Injection site reactions

Injectable meloxicam can cause local reactions at the injection site. In prairie dogs, the only adverse reactions reported after subcutaneous meloxicam were mild [15]. The same general expectation applies in dogs and cats. Report any swelling, pain, or discharge at the injection site to the veterinarian.

Which Animals Should Not Receive Meloxicam

Absolute and strong relative contraindications

Meloxicam should not be given to an animal that is dehydrated, in shock, or hypotensive. It should not be given to an animal with pre-existing kidney disease unless a veterinarian has specifically weighed the risk and decided the benefit justifies it. It should not be given to an animal with active gastrointestinal ulceration or a history of NSAID-related GI bleeding. It should not be given to an animal with a known hypersensitivity to meloxicam or other oxicam NSAIDs.

Concurrent NSAIDs and corticosteroids

Do not give meloxicam at the same time as another NSAID. Do not give it with a corticosteroid such as prednisone or dexamethasone. Combining an NSAID with a steroid multiplies the risk of gastrointestinal ulceration, and combining two NSAIDs multiplies the risk of both GI and kidney injury. If a pet is already on one of these drugs and meloxicam is prescribed, the veterinarian should have a specific plan for the transition, including a washout period.

Pregnancy, breeding, and very young animals

Meloxicam is not recommended for pregnant or lactating animals, or for animals intended for breeding, unless the veterinarian has made a specific risk-benefit decision. The label specifies a minimum age for each species, and that minimum exists because young animals have immature kidney and liver function. Do not give meloxicam to a puppy or kitten below the labeled age.

Concurrent nephrotoxic drugs

Some drugs stress the kidney. Aminoglycoside antibiotics, amphotericin B, and certain chemotherapy agents are examples. Giving meloxicam alongside a nephrotoxic drug increases the chance of kidney injury, because both drugs reduce the kidney's ability to protect itself. A veterinarian managing a patient on multiple drugs needs to know every medication and supplement the animal receives, including over-the-counter products.

Caution Table: GI and Renal Risks

This table is a summary of the risks discussed in the veterinary literature and is not a substitute for a veterinarian's assessment of an individual patient [11][1][13][4].

Interactions With Other Drugs

Other NSAIDs

The most important interaction is with another NSAID. Two NSAIDs given together do not add much pain relief, but they do add GI and kidney risk. This includes aspirin, carprofen, robenacoxib, deracoxib, firocoxib, and any other prescription or over-the-counter NSAID.

Corticosteroids

Prednisone, prednisolone, dexamethasone, and other steroids should not be combined with meloxicam. The combination is a well-recognized cause of severe gastrointestinal ulceration in dogs and cats.

Nephrotoxic drugs

Aminoglycosides, amphotericin B, and some chemotherapy drugs increase the risk of kidney injury when given with meloxicam. The mechanism is additive. Each drug reduces the kidney's reserve, and together they can push a patient into acute kidney injury.

Diuretics and ACE inhibitors

Diuretics and angiotensin-converting enzyme (ACE) inhibitors change kidney blood flow and fluid balance. When combined with an NSAID, the combination can reduce kidney perfusion, particularly in a patient that is already volume-depleted. This is sometimes called a triple whammy in human medicine, and the same principle applies in veterinary patients.

Protein binding

Meloxicam is highly protein-bound, above 99 percent in rats and humans [8]. Drugs that compete for the same binding sites can increase the free fraction of meloxicam in the blood, which can increase both effect and toxicity. This is a theoretical concern that a veterinarian will consider when a patient is on multiple highly protein-bound drugs.

How Meloxicam Compares With Alternatives

Robenacoxib

Robenacoxib is an NSAID with high selectivity for COX-2. In a randomized trial of cats undergoing orthopedic surgery, a single robenacoxib injection was statistically non-inferior to meloxicam over the first 22 hours after surgery [16]. In a separate trial of cats undergoing ovariohysterectomy, owners reported fewer abnormal behaviors and lower pain scores in the meloxicam group than in the robenacoxib group, though the authors noted that owner-based pain assessment in cats has not been validated [10]. The practical takeaway is that both drugs work, and the choice depends on the patient, the procedure, and the veterinarian's judgment.

Carprofen

Carprofen is another NSAID commonly used in dogs. A study comparing gastrointestinal permeability in dogs receiving carprofen or meloxicam for more than seven days found that sucrose permeability in the carprofen group decreased significantly by day 3 and then increased again by day 8, while the meloxicam group showed no significant change [13]. That finding is not a head-to-head efficacy comparison, and it does not prove meloxicam is safer overall. It does suggest that the two drugs affect the gut differently, which is one reason a veterinarian may switch from one to the other if a patient has GI signs.

Ketoprofen

Ketoprofen is an older NSAID. A pharmacokinetic comparison in dogs found significant differences between meloxicam and ketoprofen after therapeutic oral doses, including a much longer time to peak and a much longer half-life for meloxicam [7]. The clinical implication is that meloxicam is dosed less frequently, which improves owner compliance but also means a mistake takes longer to clear.

Opioids

Opioids such as buprenorphine work through a completely different mechanism and do not carry NSAID-type GI or kidney risk. In the beagle ovariohysterectomy study, meloxicam was combined with buprenorphine as multimodal analgesia, and the combination controlled postoperative pain well [9]. For severe pain, an NSAID alone is rarely the right answer.

What to ask a veterinarian

Before starting meloxicam, ask which condition it is treating, how long it should be given, what signs of trouble to watch for, whether bloodwork is needed before and during treatment, and what other medications or supplements the pet is receiving. Ask specifically whether the pet is on any other NSAID, any steroid, or any drug that affects the kidney. Ask what to do if a dose is missed or if the pet vomits after a dose.

Clinical Relevance, Limitations and Common Mistakes

The clinical relevance of meloxicam is straightforward. It is one of the most widely used NSAIDs in small animal practice, it is effective for acute and chronic pain, and it is available in several formulations that make administration easier for owners [5][6]. The limitations are equally straightforward. The feline safety margin is narrow, the drug persists in the body for a long time, and the most serious side effects, GI ulceration and kidney injury, can develop without obvious early warning.

The most common mistakes owners make are these. Giving meloxicam with another NSAID or with a steroid. Giving it to a cat for weeks on end without veterinary supervision. Giving it to a pet that is vomiting, not eating, or not drinking. Assuming that because the pet seems better, the drug can be stopped abruptly or restarted at will. Using a human meloxicam product instead of the veterinary prescription. Missing scheduled bloodwork because the pet looks fine.

A second category of mistake is more subtle. Owners sometimes judge pain control by whether the pet is limping. A dog with arthritis may stop limping on meloxicam but still have joint pain, and a cat may become more active without any obvious lameness at all. The veterinarian's assessment, not the owner's impression, should guide whether the dose is right and whether treatment should continue.

Individual cases vary. A veterinarian who has examined the animal, reviewed its bloodwork, and knows its full medication list is the only person who can decide whether meloxicam is appropriate and for how long.

Frequently Asked Questions

What is meloxicam used for in dogs and cats?

Meloxicam is used to relieve pain, reduce fever, and control inflammation. In dogs it is used for acute and chronic pain, including postoperative pain and degenerative joint disease [2]. In cats the approved use is a single injection for postoperative pain, with short oral courses in some situations [3][4].

How do you use meloxicam safely?

Give it exactly as prescribed, with food, and do not extend the course without veterinary direction. Do not combine it with another NSAID or a corticosteroid. Watch for vomiting, diarrhea, black stool, increased thirst, or reduced appetite, and call the veterinarian if any of these appear.

Why is meloxicam dosed differently in cats than in dogs?

Cats are more sensitive to the kidney and gastrointestinal effects of NSAIDs, and the feline label is restricted because of acute kidney injury seen in a clinical trial [4]. Dogs can generally receive longer courses under veterinary supervision, while cats typically receive a single injection or a short oral course [3].

Can meloxicam be given long term to a cat?

It can be, at low doses and with monitoring. A study of 40 cats with osteoarthritis treated at 0.01 to 0.03 mg/kg once daily for a mean of 5.8 months found GI upset in 2 of 46 cats and no detected decline in renal function [11]. This is off-label use that requires veterinary supervision and periodic bloodwork.

What are the serious side effects of meloxicam?

The two most serious are gastrointestinal ulceration and kidney injury. GI ulceration can cause vomiting, diarrhea, and black tarry stool. Kidney injury can cause increased thirst and urination, lethargy, and reduced appetite. Both require stopping the drug and contacting a veterinarian.

Can meloxicam be given with prednisone or another NSAID?

No. Combining meloxicam with a corticosteroid or a second NSAID sharply increases the risk of gastrointestinal ulceration and kidney injury. If a pet is already on one of these drugs, the veterinarian needs to manage the transition with a washout period.

How long does meloxicam stay in a dog's system?

Meloxicam has a long half-life for an NSAID. One study in dogs reported an elimination half-life of about 12 hours after a single oral dose [7], and a bioequivalence study reported mean half-lives of about 29 to 33 hours depending on formulation [6]. In practical terms, the drug keeps working for many hours after each dose.

What should I do if my pet vomits after a meloxicam dose?

Stop giving the drug and call the veterinarian. Vomiting can be a sign of gastrointestinal irritation, and continuing the drug could make it worse. Do not give another dose until the veterinarian has advised you.

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