Meloxicam is processed primarily through the liver. Your liver breaks down the drug into inactive metabolites, and those metabolites then leave the body in roughly equal amounts through urine and feces. Only tiny traces of unchanged meloxicam (less than 2% combined) ever reach the kidneys or gut in their original form. So while the liver does the heavy lifting of metabolism, both the kidneys and digestive tract share the job of clearing the byproducts.
How the Liver Breaks Down Meloxicam
Two enzyme systems in the liver handle meloxicam metabolism: CYP 2C9 and CYP 3A4. These enzymes chemically modify meloxicam into inactive compounds that no longer have anti-inflammatory effects. CYP 2C9 does most of the work, while CYP 3A4 plays a supporting role. This is worth knowing because other medications that compete for the same enzymes can change how quickly your body processes meloxicam, potentially raising or lowering its levels in your blood.
Once the liver finishes its work, the resulting metabolites split almost evenly between two exit routes. About half leave through urine and about half through feces. Only 0.2% of the original, active drug shows up in urine and 1.6% in feces. Everything else has already been converted to inactive forms before it leaves your body.
Why Kidney Health Still Matters
Even though the kidneys aren’t responsible for breaking down meloxicam, the drug still affects them directly. Like all NSAIDs, meloxicam works by blocking the production of prostaglandins, the chemicals that drive inflammation and pain. The problem is that prostaglandins also help maintain blood flow to the kidneys. When meloxicam suppresses them, kidney blood flow can drop, especially in people who are already dehydrated or have reduced kidney function.
Long-term NSAID use has been linked to a specific type of kidney damage called renal papillary necrosis, as well as acute kidney failure and other forms of kidney injury. The FDA’s current labeling is clear on this point: meloxicam is not recommended for people with moderate to severe kidney impairment and is outright contraindicated in those with moderate to severe kidney problems who are also at risk of dehydration. For people on hemodialysis, the maximum dose is capped at 7.5 mg per day. No dose adjustment is needed for mild to moderate kidney impairment.
Risk to the Liver
Because the liver is doing the actual metabolic processing, liver injury is a recognized risk. In clinical trials of NSAIDs as a class, about 1% of patients developed elevated liver enzymes at three or more times the normal level. Rare but serious cases of severe liver injury, including liver failure, have been reported. The FDA recommends monitoring for problems in anyone with severe liver impairment.
For people with mild or moderate liver disease, studies show that meloxicam blood levels remain essentially the same as in healthy individuals. Protein binding, which affects how the drug circulates, is also unaffected. This means no dose adjustment is typically needed for mild to moderate liver dysfunction. Severe liver impairment is a different story: it hasn’t been well studied, so closer monitoring is warranted.
How Long Meloxicam Stays in Your System
Meloxicam has a relatively long half-life of 15 to 20 hours, which is why it’s taken once a day rather than multiple times. Women tend to clear it slightly faster (around 18 hours at steady state) compared to men (around 21 hours). Because the half-life is long, it takes several days for meloxicam to fully wash out of your system after you stop taking it, and several days of consistent dosing to reach stable blood levels.
This slow clearance is part of what makes liver and kidney function so relevant. If either organ is compromised, the drug or its metabolites can linger longer than expected, increasing the chance of side effects.
The Bottom Line on Processing
The liver metabolizes meloxicam. The kidneys and digestive tract excrete the leftovers. But “processed through” and “affected by” are two different things. Even though the kidneys don’t break the drug down, they’re arguably more vulnerable to its effects than the liver is. If you have concerns about either organ, that context shapes how safely meloxicam fits into your treatment.