Losartan does not cause gout. It is the only blood pressure medication in its class that actually lowers uric acid levels, which means it reduces gout risk rather than increasing it. In a large population-based study, people taking losartan had a 19% lower risk of developing gout compared to those not taking the drug.
If you’re taking losartan and experiencing gout symptoms, the medication itself is almost certainly not the cause. But the relationship between blood pressure drugs and gout is worth understanding, because some other common medications prescribed alongside or instead of losartan can absolutely raise your risk.
How Losartan Lowers Uric Acid
Losartan belongs to a group of blood pressure drugs called angiotensin receptor blockers (ARBs). While all ARBs lower blood pressure through the same basic mechanism, losartan has a bonus effect that none of the others share: it blocks a specific transporter in the kidneys called URAT1. This transporter normally pulls uric acid back into the body after the kidneys have filtered it out. By blocking it, losartan lets more uric acid leave through urine instead of building up in the blood.
This is the same approach that dedicated gout medications like probenecid use. Losartan isn’t potent enough to replace a gout drug on its own, but the effect is meaningful. Clinical data published in the Annals of Internal Medicine estimates losartan can lower uric acid by roughly 0.5 to 1 mg/dL. For context, the threshold where uric acid starts forming the crystals that cause gout pain is around 6.8 mg/dL, so even a modest drop can make a real difference for someone near that line.
Interestingly, it’s the losartan molecule itself that produces this effect, not the breakdown product your liver creates from it. And the effect doesn’t appear to be strongly dose-dependent. One study in patients with both high blood pressure and elevated uric acid found that 50 mg once daily lowered uric acid significantly, but doubling the dose to 50 mg twice daily didn’t produce any additional reduction.
Other ARBs Can Raise Uric Acid
This is where the picture gets surprising. While losartan lowers uric acid, the other ARBs, medications that seem nearly identical, do the opposite. A retrospective study comparing five common ARBs found that valsartan, telmisartan, candesartan, and olmesartan all significantly increased uric acid levels over a year of use. The difference between losartan users and everyone else was statistically clear, and there was no meaningful variation among the four non-losartan ARBs. They all nudged uric acid upward by similar amounts.
If you were previously on losartan and your doctor switched you to a different ARB, that switch alone could explain a rise in uric acid. It’s a detail that often gets overlooked because these drugs are treated as interchangeable for blood pressure purposes.
Diuretics Are the Real Gout Culprit
The blood pressure medications most strongly linked to gout are diuretics, particularly thiazide diuretics like hydrochlorothiazide. These are among the most commonly prescribed blood pressure drugs in the world, and they raise uric acid by reducing how much the kidneys excrete. In the same large study that found losartan protective, diuretic use carried an adjusted relative risk of 2.36 for developing gout. That’s more than double the risk compared to not using them.
The gap between losartan and diuretics is striking: a relative risk of 0.81 for losartan versus 2.36 for diuretics. Because many people with high blood pressure take a diuretic alongside their ARB, it’s easy to blame the wrong pill. If you’re on both losartan and a diuretic and you develop gout, the diuretic is the far more likely contributor.
The American College of Rheumatology guidelines address this directly. They recommend that patients with both high blood pressure and gout should be switched from hydrochlorothiazide to losartan when possible. That recommendation treats losartan not just as safe for gout patients but as actively preferable.
One Caution: Early Flares Are Possible
There is one scenario where starting losartan could theoretically trigger a gout flare, and it’s the same paradox that happens with any treatment that lowers uric acid. When uric acid levels drop, existing urate crystals that have built up in your joints can become unstable and partially dissolve. That process itself can provoke inflammation and pain, particularly in the first few months.
This doesn’t mean losartan caused the gout. It means your body already had crystal deposits, and the shift in uric acid levels stirred things up. Dedicated gout medications carry the same risk, which is why rheumatology guidelines recommend short-term flare prevention when starting any urate-lowering therapy. With losartan, the uric acid drop is modest enough that this scenario is uncommon, but it’s worth knowing about if you experience joint pain shortly after starting the drug.
Losartan in Kidney Disease
Losartan is frequently prescribed for people with kidney problems, and kidney disease itself raises uric acid levels. The good news is that losartan’s uric acid-lowering effect appears to persist even in patients with reduced kidney function. Studies have documented lower uric acid levels in losartan users across various stages of kidney disease. Even patients on hemodialysis showed reductions in uric acid, which is notable because their kidneys are barely filtering anything at all, suggesting losartan may have additional mechanisms beyond simply increasing urinary excretion.
A post hoc analysis from a major trial in patients with type 2 diabetes and kidney disease found that the uric acid reduction from losartan was associated with better kidney outcomes over time. While that doesn’t prove the uric acid reduction itself protected the kidneys, it adds to the picture of losartan as a uniquely favorable choice for people managing multiple conditions at once.
What to Do if You Have Gout Symptoms on Losartan
If you’re taking losartan and developing gout flares, look at the rest of your medication list first. Diuretics are the most common pharmaceutical trigger. Low-dose aspirin, which many people with high blood pressure also take for heart protection, raises uric acid as well. Factors unrelated to medication, like diet, alcohol intake, body weight, and genetics, remain the primary drivers of gout for most people.
If anything, having gout is a reason to stay on losartan rather than switch to a different blood pressure drug. Among all commonly used antihypertensives, losartan occupies a unique position as the one that actively works in your favor against uric acid buildup.