Several common medications can trigger gout flare-ups by raising uric acid levels in your blood. The biggest culprits are diuretics (water pills), low-dose aspirin, certain blood pressure medications, and tuberculosis drugs. Some of these you may be taking every day without realizing the connection to your gout.
The mechanism is usually the same: the drug either slows your kidneys’ ability to flush uric acid out or accelerates uric acid production. Either way, levels climb until crystals form in your joints. Knowing which medications carry this risk lets you have a focused conversation with your doctor about alternatives.
Diuretics (Water Pills)
Diuretics are the most well-known medication trigger for gout. Both thiazide diuretics (commonly prescribed for high blood pressure) and loop diuretics (often used for heart failure and swelling) reduce the amount of uric acid your kidneys excrete. They do this by increasing uric acid reabsorption back into the bloodstream and decreasing its secretion into urine. The effect is dose-dependent, meaning higher doses cause a bigger spike in uric acid.
Elevated uric acid from diuretics is so common that the American College of Rheumatology’s 2020 gout guidelines specifically recommend switching off hydrochlorothiazide, one of the most widely prescribed thiazide diuretics, to an alternative blood pressure medication when feasible. If you take a diuretic for blood pressure rather than for heart failure or kidney disease, you likely have other options worth discussing.
Low-Dose Aspirin
This one surprises many people. The baby aspirin (81 mg) or full-strength aspirin (325 mg) that millions take daily for heart protection falls squarely in the dose range that causes uric acid retention. Aspirin doses up to 1 to 2 grams per day reduce uric acid excretion through the kidneys. Only at much higher doses, above 3 grams per day (which almost nobody takes anymore), does aspirin actually have the opposite effect and help flush uric acid out.
Studies have measured the impact directly: a daily 75 mg dose of aspirin decreased the kidney’s uric acid clearance by 1.35 ml/min and raised blood uric acid by 0.27 mg/dL. That may sound small, but for someone already near the threshold for crystal formation, it can be enough to tip the balance. Despite this risk, the ACR guidelines recommend against stopping low-dose aspirin if you’re taking it for a legitimate heart condition, because the cardiovascular benefits generally outweigh the gout risk. The better strategy is to manage uric acid through other means.
Blood Pressure Medications: Risk and Protection
Not all blood pressure drugs affect gout equally, and this is one area where a simple medication swap can make a real difference. A large population-based study found that calcium channel blockers lowered the risk of developing gout by about 13%, while losartan (an angiotensin receptor blocker) reduced risk by 19%. Losartan lowers uric acid levels by 20 to 25% through a mechanism similar to dedicated uric acid-lowering drugs. Specific calcium channel blockers like amlodipine, nifedipine, and diltiazem all showed protective effects.
On the other hand, other blood pressure medications don’t offer this protection, and diuretics actively make things worse. If you have both hypertension and gout, the ACR guidelines conditionally recommend choosing losartan as your blood pressure medication when feasible. This is one of the clearest cases where a drug substitution can address two problems at once.
Tuberculosis Drugs
Pyrazinamide, a cornerstone of tuberculosis treatment, is one of the most potent uric acid-raising drugs in clinical use. A standard therapeutic dose reduces the kidney’s uric acid clearance by more than 80%. Between 43% and 100% of patients on pyrazinamide develop elevated uric acid levels, and clinical gout attacks have been documented during treatment. Ethambutol, another TB drug, also decreases renal uric acid clearance, though less consistently and to a lesser degree.
Since TB treatment regimens are not easily modified, the practical approach is usually to manage gout symptoms during the treatment course rather than switch medications.
Niacin (Vitamin B3)
Prescription-strength niacin, used to manage cholesterol, can cause gout. The Mayo Clinic lists gout as a side effect of high-dose niacin, noting that serious side effects become likely at doses between 2,000 and 6,000 mg per day. Niacin raises blood uric acid levels directly. If you have a history of gout and are considering niacin for cholesterol, this is worth flagging to your doctor, as statin alternatives exist that don’t carry this risk.
Immunosuppressants After Organ Transplant
Gout is notably common among organ transplant recipients, and the main culprit is cyclosporine, an anti-rejection medication. Among transplant patients taking cyclosporine, 18.3% had gout, compared to 9.3% on tacrolimus (a newer alternative) and 9.1% on neither drug. That means cyclosporine roughly doubles the gout rate in this population. The difference between cyclosporine and tacrolimus is significant enough that it may factor into medication decisions for transplant patients with gout history.
Cancer Treatments
Chemotherapy can trigger dangerous spikes in uric acid through a process called tumor lysis syndrome. When cancer treatment rapidly destroys large numbers of tumor cells, those cells release their contents into the bloodstream, including the building blocks that get converted to uric acid. This is most common in cancers with high cell turnover rates, particularly Burkitt’s lymphoma, certain leukemias, and highly chemo-sensitive tumors like small cell lung cancer.
Specific drugs more frequently implicated include cytosine arabinoside, etoposide, cisplatin, and intrathecal methotrexate, though the risk depends more on the tumor’s sensitivity and size than on any single drug. Monoclonal antibodies, high-dose corticosteroids, and even radiation therapy can also trigger it. This type of uric acid spike is managed proactively by oncology teams, so it’s less of a “watch out for this” situation and more something your cancer care team will already be monitoring.
Levodopa for Parkinson’s Disease
An emerging connection links levodopa, the primary medication for Parkinson’s disease, to gout flare-ups. A review of the World Health Organization’s global drug safety database found 43 reported cases of gout associated with levodopa-class drugs. In one well-documented case, a 77-year-old man developed his first gout attack after starting levodopa. The drug was stopped and gout was treated, but when levodopa was restarted due to Parkinson’s progression, the gout returned. While “abnormal uric acid levels” appears in levodopa’s product information, gout itself is not yet listed as a recognized side effect. The association is still being studied, but it’s worth being aware of if you’re on levodopa and experiencing unexplained joint pain.
Testosterone Therapy
Testosterone replacement therapy has been linked to gout onset in case reports, including in individuals undergoing female-to-male gender-affirming hormone therapy who developed elevated uric acid and gout shortly after starting testosterone. Research on the broader relationship between testosterone and uric acid shows a more complicated picture: men with naturally low testosterone (below 400 ng/dL) actually have a higher risk of elevated uric acid. But introducing exogenous testosterone appears to raise uric acid levels as well. If you’re starting testosterone therapy and have risk factors for gout, monitoring uric acid levels early on is a reasonable precaution.