Meloxicam for Dogs: Dosage, Side Effects and Safety

14 septembre 2026

Senior labrador resting at home, illustrating a guide to meloxicam for dogs

Meloxicam is a prescription non-steroidal anti-inflammatory drug (NSAID) sold for dogs as Metacam, and it is FDA-approved for one specific job: controlling the pain and inflammation of osteoarthritis. The label dose is 0.2 mg/kg on the first day only, then 0.1 mg/kg once daily after that — a number your veterinarian sets, not one you calculate at home. The two things that send dogs to the emergency clinic on this drug are not exotic: giving it alongside a steroid or a second NSAID, and measuring the wrong bottle.

That second one deserves its own paragraph, because almost no article on meloxicam mentions it. Metacam oral suspension is sold in two different strengths — 0.5 mg/mL and 1.5 mg/mL. A dose measured out of the 1.5 mg/mL bottle using a number from the 0.5 mg/mL bottle delivers three times the intended amount. Before every refill, read the mg/mL printed on the label and confirm it matches what your vet wrote.

What meloxicam actually does in a dog's body

Meloxicam blocks cyclooxygenase (COX) enzymes, which are what the body uses to manufacture prostaglandins. Some prostaglandins drive the swelling, heat and pain of an inflamed joint. Others do useful maintenance work — protecting the stomach lining and keeping blood flowing through the kidneys. Meloxicam is preferential for COX-2, the inflammatory side, but "preferential" is not "exclusive." That overlap is the entire reason the label carries stomach and kidney warnings.

The pharmacology on the FDA label is worth knowing. Oral bioavailability is roughly 100% when given with food, peak concentration arrives around 7.5 hours after dosing, and the terminal half-life is about 24 hours — which is why it is a once-daily drug. The label also records something most owners are never told: "there is some evidence of enhanced drug accumulation and terminal elimination half-life prolongation when dogs are dosed for 45 days or longer." A dog six months into daily meloxicam is not in the same pharmacological situation as a dog on day 10, and that is precisely why periodic bloodwork is on the label rather than being optional.

What the FDA label approves it for — and what it doesn't

The approved indication for Metacam Oral Suspension is narrow and specific: "the control of pain and inflammation associated with osteoarthritis in dogs." The 5 mg/mL injectable solution carries an osteoarthritis indication in dogs as well, given subcutaneously. Anything else you hear it used for — post-surgical pain, soft-tissue injury, dental procedures — is a veterinarian making an extra-label judgement call, which is legal and common but sits outside the studied data.

The effectiveness data behind that approval is also narrower than the way the drug is used. Two placebo-controlled masked field studies enrolled 277 dogs, and both ran for 14 days. The first (109 dogs) showed significant improvement across all measured parameters. The second (48 dogs) showed improvement across parameters but reached statistical significance only for the investigator's day-7 evaluation and the owner's day-14 evaluation. Meloxicam is a genuinely effective osteoarthritis drug — and the pivotal evidence supporting it is two weeks long, while many dogs take it for years.

Question	What the FDA label states
Approved use	Control of pain and inflammation associated with osteoarthritis in dogs
Day 1 dose	0.2 mg/kg (0.09 mg/lb), first day only
Day 2 onward	0.1 mg/kg (approx. 0.045 mg/lb) once daily
Dosing philosophy	"Use the lowest effective dose for the shortest duration consistent with individual response"
Oral suspension strengths	0.5 mg/mL and 1.5 mg/mL — check which one you have
Dogs under 10 lb	Drops placed on food only — never squirted directly into the mouth
Before starting	History, physical exam, and baseline bloodwork (hematology + serum biochemistry) recommended
During treatment	Laboratory testing "periodically during administration"

Dosing figures above are reproduced from the FDA label for reference and owner understanding only. They are not instructions. Your veterinarian sets the dose for your dog, and you should never adjust, split, skip or extend a prescription on your own.

The warnings that matter most

Never with a steroid, never with a second NSAID

This is the single most important sentence on the label: "concomitant use with other anti-inflammatory drugs, such as NSAIDs or corticosteroids, should be avoided." Stacking meloxicam on prednisone, or on aspirin, carprofen, deracoxib or firocoxib, multiplies the risk of gastrointestinal ulceration and perforation. If your dog needs more pain control than meloxicam alone provides, the label directs veterinarians toward a drug from a different class entirely — which is why gabapentin, or a monoclonal antibody like Adequan for dogs, often gets added rather than a second anti-inflammatory.

Switching between NSAIDs, or moving off a steroid onto meloxicam, requires an appropriate washout period. There is no universal number — it depends on the drug being left behind and the individual dog. Never bridge the gap yourself with leftover medication from a previous prescription or another pet.

Never in cats

The Metacam oral suspension label opens with a bolded warning: "Repeated use of meloxicam in cats has been associated with acute renal failure and death. Do not administer additional injectable or oral meloxicam to cats." In a multi-pet household, store the bottle where the wrong animal cannot reach it.

Dogs at elevated risk

The label flags dogs that need extra caution: those who are dehydrated, on diuretics, or who have pre-existing kidney, cardiovascular or liver disease. Safety has not been evaluated in dogs under 6 months old, or in breeding, pregnant or lactating dogs. Meloxicam is not recommended in dogs with bleeding disorders. The drug is about 97% plasma-protein bound, so interactions with other highly protein-bound medications — cardiac drugs, anticonvulsants, behavioral medications — have not been studied and warrant a conversation with your vet.

Side effects: what's common, what's an emergency

In the label's field safety study of 306 dogs, gastrointestinal signs were the most frequent finding: vomiting, soft stools, diarrhea, and reduced appetite. Post-approval reporting adds a broader picture, and the label is blunt about the ceiling: "Serious adverse reactions associated with this drug class can occur without warning and in rare situations result in death."

System	Reported effects	What it looks like at home
Gastrointestinal	Vomiting, anorexia, diarrhea, melena, GI ulceration	Skipped meals; black, tarry or bloody stool
Urinary / renal	Azotemia, elevated creatinine, renal failure	Marked change in drinking or urination
Hepatic	Elevated liver enzymes	Yellowing of gums, skin, or whites of the eyes
Neurologic / behavioral	Lethargy, depression	Incoordination, seizure, unusual aggression
Hematologic	Anemia reported post-approval	Pale gums
Dermatologic	Pruritus	New scratching, redness, scabs

Stop and call your veterinarian today if you see

Black, tarry, or bloody stool, or vomit that looks like coffee grounds
Repeated vomiting, or two missed meals in a row
Pale gums, or yellowing of the gums, skin, or whites of the eyes
A clear change in how much your dog drinks or urinates
Lethargy, incoordination, seizure, or out-of-character aggression

There is a reassuring counterpart to that list, and it is also on the label: most dogs recover when the signs are recognized early and the drug is withdrawn. Vigilance is the protective factor. If your dog swallows the bottle or receives an accidental overdose, call your veterinarian, the Pet Poison Helpline, or the ASPCA Animal Poison Control Center immediately.

A monitoring schedule worth asking your vet for

The label says baseline bloodwork "is recommended prior to and periodically during administration" — and then leaves "periodically" undefined, which is how most dogs end up on year-three of an NSAID with year-one bloodwork. These are reasonable questions to bring to your appointment:

Before the first dose: complete blood count and serum chemistry, so there is a genuine baseline to compare against — especially kidney values and liver enzymes.
Early in treatment: ask what recheck interval your vet wants for your specific dog, and whether anything in the baseline panel changes that interval.
Past roughly 45 days of continuous use: raise the label's own accumulation note directly. It is a legitimate, sourced reason to ask about recheck frequency.
At every visit: report appetite, stool colour, and water intake. These are the three things you can observe daily that bloodwork only catches later.

Meloxicam compared with the other options

Meloxicam is one of several drugs a veterinarian may reach for. It is not automatically the best or the worst of them.

Drug	Class	How it works	Notes
Meloxicam (Metacam)	NSAID	Preferential COX-2 inhibition	Once daily; two suspension strengths; long track record
Carprofen for dogs (Rimadyl)	NSAID	COX inhibition	Often twice daily; same class-wide GI and renal cautions
Galliprant for dogs (grapiprant)	Piprant	Blocks the EP4 prostaglandin receptor	Not a COX inhibitor; absorption drops sharply if given with food
Firocoxib (Previcox)	Coxib NSAID	COX-2 selective	Another NSAID — never combined with meloxicam

On the specific question of meloxicam versus carprofen, the honest answer is that the comparison has barely been done. A veterinary evidence review found only two trials directly comparing them and concluded there is insufficient evidence that either is superior. A 2003 study in Veterinary Record using force-plate gait analysis in 71 dogs (PMID 12665145) found that both carprofen and meloxicam improved ground reaction forces while a nutraceutical did not. Choosing between NSAIDs is usually a matter of how an individual dog responds and tolerates, not a ranking.

For the wider picture of what else exists, our guide to dog arthritis medicine lays out the full menu, and what can I give my dog for joint pain covers the non-prescription side.

What genuinely helps alongside a prescribed NSAID

Nothing here replaces meloxicam, and nothing here should change your dog's prescription. But the Metacam client information sheet itself tells owners to discuss "the importance of weight control and exercise in the management of osteoarthritis" — so the drug's own manufacturer expects something to happen outside the bottle.

Weight is the strongest lever that isn't a drug. A 2010 study in Veterinary Research Communications (PMID 20237844) put 14 obese client-owned dogs with osteoarthritis on a calorie-restricted diet for 16 weeks and recorded a significant decrease in lameness from roughly 6.1% body-weight loss onward. Six percent. That is a genuinely achievable target for most households.

On supplements, the evidence is uneven, and it is worth saying which way. The largest analysis available is a 2022 systematic review and meta-analysis in International Journal of Molecular Sciences (PMID 36142319), covering 72 trials across nine compound categories in canine and feline osteoarthritis. Its findings do not flatter the category as a whole:

Ingredient class	What the 2022 meta-analysis concluded
Omega-3 (EPA/DHA) diets and supplements	Clear analgesic efficacy — the strongest signal in the review
Cannabidiol	Efficacy to a lesser degree
Collagen	Weak
Chondroitin–glucosamine	A "very marked non-effect"; the authors recommend these no longer be recommended for osteoarthritis pain

That last row is inconvenient for most of the joint-supplement industry, and we are publishing it anyway, because it is the clearest possible explanation of how we build. A two-ingredient glucosamine-and-chondroitin chew rests its entire proposition on the one class this meta-analysis singles out as ineffective. Our Advanced Hip & Joint Chews carry 18 active ingredients across four functional layers, which means the classes the evidence actually favours — omega-3 fatty acids, green-lipped mussel, and undenatured type-II collagen — are present rather than being an afterthought behind a glucosamine headline. For dogs who refuse chews or need something mixed into food, our liquid glucosamine for dogs covers the same ground in a pourable form, and the full dog joint and hip supplements range is worth comparing side by side.

Every batch is manufactured in North America under GMP conditions with a certificate of analysis, and shipping is free worldwide. Tell your veterinarian what you are giving — supplements belong in the medical record alongside the prescription, not beside it.

Frequently asked questions

How much meloxicam can I give my dog?

Only the amount your veterinarian prescribed. The FDA label for Metacam Oral Suspension specifies 0.2 mg/kg on the first day and 0.1 mg/kg once daily afterwards, but the correct volume depends on whether you have the 0.5 mg/mL or the 1.5 mg/mL bottle — a three-fold difference. Confirm the concentration on your label matches the instructions you were given, and never estimate.

How long can a dog stay on meloxicam?

There is no fixed limit; many dogs take it long-term under veterinary supervision. The label instructs veterinarians to use the lowest effective dose for the shortest duration consistent with response, and notes evidence of drug accumulation and half-life prolongation in dogs dosed for 45 days or longer. That makes periodic bloodwork more important the longer treatment continues.

Can I give my dog human meloxicam?

No. Human meloxicam tablets (Mobic) come in strengths designed for people, and splitting them to approximate a dog's dose is how overdoses happen — a dog's maintenance dose is a fraction of a milligram per kilogram. Use only a veterinary product dispensed for your dog.

How long does meloxicam take to work in dogs?

Peak blood concentration occurs around 7.5 hours after an oral dose, so some owners notice a difference the first day. The osteoarthritis field studies behind the approval measured their outcomes at day 7 and day 14, which is a more realistic window for judging whether the drug is helping your dog's mobility.

Can my dog take meloxicam with prednisone?

The label says concurrent use with corticosteroids or other NSAIDs should be avoided because of the risk of gastrointestinal ulceration and perforation. Switching between them requires a washout period determined by your veterinarian. Never overlap the two on your own.

Can meloxicam be given to cats?

The dog oral suspension label carries a bolded warning that repeated use of meloxicam in cats has been associated with acute renal failure and death, and instructs that additional injectable or oral meloxicam should not be administered to cats. Never give a dog's Metacam to a cat.

Outside the United States

The label you are reading depends on where you live. In the United States, meloxicam's approved indication is narrow — the control of pain and inflammation associated with osteoarthritis — while the UK and EU marketing authorisations cover the broader category of acute and chronic musculoskeletal disorders. The oral suspension strengths on sale differ too, and so does which concentration is the cat product rather than the dog one, which is exactly the kind of detail that causes a measuring error. If you are outside the US, read your own market's version rather than the US label: