What Meloxicam Actually Does for Dogs
Meloxicam is a nonsteroidal anti-inflammatory drug, or NSAID, sold under brand names like Metacam and generic labels alike. It's not a new drug — vets have leaned on it for over two decades — and it remains one of the most commonly dispensed pain medications in general practice, right alongside gabapentin and prednisone.
Unlike gabapentin, which dulls nerve signaling, meloxicam works by blocking the enzymes (COX-2, mostly) that produce inflammation at the source. That makes it a go-to for arthritis, the slow-building joint pain that shows up in older dogs and larger breeds especially, and for the acute inflammation that follows surgery or an injury. It reduces swelling and pain together, rather than just masking one or the other.
Most dogs on meloxicam are either seniors managing chronic osteoarthritis or dogs recovering from an orthopedic procedure like a TPLO or a spay/neuter. It's less commonly used for anxiety or behavioral issues since it doesn't touch the nervous system the way trazodone or gabapentin does — it's strictly an anti-inflammatory.
Meloxicam Dosage Chart for Dogs by Weight
Meloxicam is typically dosed in two stages: a slightly higher loading dose on the first day, then a lower maintenance dose once daily after that. The figures below reflect the schedule most commonly cited in veterinary drug references. This is general reference information, not a prescription — your vet sets the actual dose based on your dog's weight, kidney function, and why they're being treated.
| Dog's Weight | Day 1 Loading Dose (0.2 mg/kg) | Maintenance Dose (0.1 mg/kg, once daily) |
|---|---|---|
| 10 lbs (4.5 kg) | 0.9 mg | 0.45 mg |
| 20 lbs (9 kg) | 1.8 mg | 0.9 mg |
| 30 lbs (13.6 kg) | 2.7 mg | 1.4 mg |
| 40 lbs (18 kg) | 3.6 mg | 1.8 mg |
| 50 lbs (22.7 kg) | 4.5 mg | 2.3 mg |
| 60 lbs (27 kg) | 5.4 mg | 2.7 mg |
| 70 lbs (31.8 kg) | 6.4 mg | 3.2 mg |
| 80 lbs (36 kg) | 7.3 mg | 3.6 mg |
| 90 lbs (40.8 kg) | 8.2 mg | 4.1 mg |
| 100 lbs (45 kg) | 9.1 mg | 4.5 mg |
After the first day, most dogs stay on the lower maintenance dose indefinitely for chronic conditions, or for a short defined course after surgery. For your dog's specific weight, run it through the Meloxicam Dosage Calculator rather than eyeballing it between rows on a chart.
Meloxicam is usually dispensed as an oral liquid (often 1.5 mg/mL) with a dosing syringe, which is more precise for smaller dogs than trying to split a tablet. Always use the syringe that came with the bottle — kitchen measuring spoons aren't accurate enough at these doses.
Why the Loading Dose Exists
The higher first-day dose gets meloxicam to a therapeutic level in the bloodstream faster, since NSAIDs take a few days to reach full effect if you start at the low maintenance dose alone. After that first day, dropping to the maintenance dose keeps inflammation under control while limiting the drug's cumulative load on the kidneys and GI tract over weeks or months of use.
Some vets skip the loading dose for very small or older dogs and start straight at the maintenance level, particularly if kidney function is already a concern. That's a clinical judgment call, which is exactly why the schedule your vet writes on the label should always override a generic chart.
Common Side Effects
Most dogs tolerate meloxicam well, but it's still an NSAID, and NSAIDs carry real risk with the GI tract, kidneys, and liver. Watch for:
- Decreased appetite or mild nausea, especially in the first few days
- Soft stool or diarrhea
- Vomiting
- Increased thirst or urination
- Lethargy that goes beyond normal quiet recovery
Give meloxicam with food — it cuts down on stomach upset significantly and is one of the simplest things owners get wrong by dosing on an empty stomach.
The Warning Signs That Mean Stop and Call
A smaller set of symptoms points to something more serious than routine GI upset, and these mean stopping the medication and calling the vet the same day:
- Black, tarry stool or visible blood in vomit or stool (signs of GI bleeding or ulceration)
- Repeated vomiting
- Yellowing of the gums or eyes (jaundice)
- Significant lethargy or collapse
- Marked drop in appetite lasting more than a day or two
These aren't "wait and see" symptoms. NSAID-related GI ulcers and kidney injury can escalate quickly, and catching it early makes a real difference in outcome.
Meloxicam and Drug Interactions
The single most important rule with meloxicam: never combine it with another NSAID or with a corticosteroid like prednisone. That includes over-the-counter human NSAIDs — ibuprofen, naproxen, and aspirin are all off the table for a dog already on meloxicam, and giving them together dramatically raises the risk of GI ulceration and kidney damage. If a vet is switching a dog from one NSAID to another, or from a steroid to an NSAID, there's usually a required washout period in between, not an overlap.
Dogs on other medications that affect kidney function — some diuretics, certain blood pressure medications, or other nephrotoxic drugs — need extra monitoring or dose adjustments. This is also why vets typically want baseline bloodwork before starting a dog on meloxicam for chronic use, and periodic rechecks after that, especially for older dogs or those with any history of kidney or liver issues.
Meloxicam is dosed very differently — and far more narrowly — in cats than in dogs. Never give a dog's meloxicam prescription, or leftover liquid, to a cat in the household without a vet's specific instruction.
When to Call the Vet or Poison Control
Contact your vet or ASPCA Animal Poison Control (888-426-4435, 24/7, consultation fee applies) immediately if your dog:
- Gets into a bottle or more than the prescribed dose
- Shows black or bloody stool, or blood in vomit
- Becomes noticeably lethargic, weak, or collapses
- Stops eating or drinking normally for more than a day
Bring the bottle. The exact concentration and how much is missing changes how the vet or poison control assesses the situation.
Recommended Tools
- Meloxicam Dosage Calculator — Enter your dog's weight for the loading and maintenance dose range.
- Gabapentin Dosage Calculator — Often layered with meloxicam for chronic arthritis pain that needs more than an NSAID alone.
- Dog BMI Calculator — Extra weight worsens joint inflammation, and an accurate weight also matters for dosing.
- Vet Cost Estimator — Budget for the bloodwork and rechecks that come with long-term NSAID use.
- Pet Insurance Calculator — Worth running if arthritis management is turning into a recurring line item.
Before the Next Dose
Confirm the number your vet prescribed against your dog's current weight, give it with food, and keep an eye out for the GI warning signs above during the first week especially. Chronic pain management works best when it's consistent — skipping doses or restarting after a long gap is something to run past your vet first.
Frequently asked questions
PawCalculator Editorial
We combine veterinary references, published guidelines, and calculator-grade modeling. This article is for education, not a substitute for an exam.
+ Follow on PawTalk
