Hero Image

5 Medications That Can Cause Kidney Damage (and What to Do)

Some common medicines can quietly injure your kidneys.

If you take pain relievers, heartburn drugs, antibiotics, mood stabilizers, or antivirals, it pays to know the risks, early warning signs, and what to do if trouble starts. This guide walks you through five widely used medications linked to kidney damage, who’s at risk, what symptoms to watch for, and evidence-based treatments. It’s general information, not medical advice—always consult your clinician.

5 medications that can harm your kidneys

While many drugs are safe when used correctly, several are well known for nephrotoxicity, especially at high doses, with dehydration, or in people with kidney disease. We’ll highlight five you’re likely to encounter.

Risk rises when factors stack: age 65+, diabetes or high blood pressure, pre‑existing chronic kidney disease (CKD), use of multiple nephrotoxic drugs, or contrast dye around the same time. Always ask your clinician to check dosing against your estimated glomerular filtration rate (eGFR).

1) NSAIDs (ibuprofen, naproxen, high-dose aspirin)

Nonsteroidal anti-inflammatory drugs (NSAIDs) can reduce blood flow into the kidney by blocking prostaglandins, which help keep kidney vessels open. Overuse or use during dehydration can trigger acute kidney injury (AKI) and, over time, raise CKD risk. Learn more about analgesic-related kidney injury from the NIDDK.

  • Safer-use tips: Use the lowest effective dose for the shortest time, avoid doubling up on multiple NSAIDs, and don’t use them when you’re dehydrated or ill with vomiting/diarrhea.
  • Read OTC labels carefully; see the FDA’s overview of OTC NSAIDs.

2) Proton pump inhibitors (PPIs: omeprazole, lansoprazole)

PPIs, used for heartburn and reflux, have been linked to acute interstitial nephritis (a kidney allergic reaction) and, in observational studies, higher rates of CKD. The risk appears higher with long-term use. See an overview of PPI-associated kidney issues in JAMA Internal Medicine and a review of drug-induced interstitial nephritis on PMC.

  • Safer-use tips: Use the lowest effective dose, consider step-down therapy if symptoms allow, and re-check the need for chronic PPI use with your prescriber.

3) Aminoglycoside antibiotics (e.g., gentamicin)

These powerful hospital antibiotics can injure kidney tubules (acute tubular necrosis), especially with prolonged courses, high trough levels, or concurrent nephrotoxins. Close monitoring of drug levels and kidney function is standard. See the StatPearls overview of aminoglycosides.

  • Safer-use tips: Ensure levels are checked when indicated, stay well hydrated, and avoid other nephrotoxic drugs when possible.

4) Lithium (for bipolar disorder)

Chronic lithium use can cause nephrogenic diabetes insipidus (excessive urination/thirst) and, in some, chronic tubulointerstitial nephritis. Regular monitoring of serum lithium and kidney function helps reduce risk. Review lithium-related kidney effects on PMC.

  • Safer-use tips: Keep lithium in the therapeutic range, maintain steady hydration and sodium intake, and get periodic eGFR and urine checks as advised.

5) Certain antivirals (tenofovir disoproxil fumarate, acyclovir)

Tenofovir disoproxil fumarate (TDF) can cause proximal tubular injury in susceptible patients; the newer formulation (TAF) is generally easier on the kidneys. Acyclovir, especially IV or in dehydration, can crystallize in the kidney. See reviews of tenofovir renal toxicity and StatPearls on acyclovir.

  • Safer-use tips: Dose-adjust for eGFR, hydrate well, and monitor urine and blood tests as recommended by your clinician.

Who’s at higher risk?

Anyone can experience kidney side effects, but the odds are higher if you have CKD, diabetes, high blood pressure, heart failure, liver disease, are over 65, are dehydrated or acutely ill, or use multiple nephrotoxic drugs at once. Learn CKD basics from the CDC.

  • CKD (any stage) or a history of kidney injury
  • Diabetes, hypertension, or cardiovascular disease
  • Age 65+, frailty, or low body weight
  • Dehydration, vomiting/diarrhea, or heavy exercise/heat exposure
  • Concurrent nephrotoxins (e.g., NSAIDs + aminoglycoside; PPI + diuretic; IV contrast close in time)

Early signs and symptoms of medication-related kidney injury

Kidney damage can be “silent,” especially early on. Symptoms tend to be nonspecific. Don’t wait for severe signs—lab tests catch problems earlier. See more about AKI from the NIDDK.

  • Less urine than usual or darker urine
  • New swelling in legs/ankles/around the eyes
  • Fatigue, nausea, poor appetite, or metallic taste
  • Back/flank pain (especially with stone/crystal issues)
  • Foamy urine (could indicate protein); ask about a urine albumin-to-creatinine ratio (uACR)
  • Blood tests showing rising creatinine or falling eGFR

Emergency signs: chest pain, trouble breathing, confusion, severe weakness, or no urine for 12+ hours—seek urgent care.

What to do if you think a medicine is hurting your kidneys

  • Call your clinician promptly. Ask whether to stop or swap the suspected drug. Don’t stop essential prescriptions without guidance.
  • Hydrate—unless you’re on fluid restriction. Sipping water can help if dehydration contributed; check first if you have heart/kidney failure.
  • List every product you take, including OTC pain relievers, acid reducers, cold medicines, supplements, and topical NSAID gels.
  • Request labs: basic metabolic panel, eGFR, urine dipstick, and uACR. Ask for repeat testing to confirm improvement.
  • Report serious adverse events to the FDA’s MedWatch program.

Evidence-based treatments for medication-related kidney damage

Remove the trigger and support the kidneys

The first step is stopping or substituting the offending medicine and avoiding other nephrotoxins (NSAIDs, contrast dye) while you recover. Gentle, isotonic IV fluids may be used for dehydration. Doses of essential drugs are adjusted to eGFR. See the KDIGO guidance for AKI care (KDIGO AKI guideline).

Treat the specific cause

  • Allergic interstitial nephritis (e.g., from PPIs): stopping the drug is key; corticosteroids may be considered by a specialist after biopsy or strong clinical suspicion.
  • Crystal nephropathy (e.g., acyclovir): aggressive hydration; sometimes urine alkalinization is used.
  • Tubular toxicity (e.g., aminoglycosides, cisplatin): stop exposure, optimize fluids/electrolytes, and monitor levels closely.
  • Obstruction: relieve the blockage (catheter, procedures) and treat the underlying cause.

Manage complications

  • Correct high potassium, acidosis, and fluid overload promptly.
  • Control blood pressure; diuretics may relieve edema in volume-overloaded patients.

Dialysis when needed

Short-term dialysis can bridge severe cases—think “AEIOU” triggers: Acidosis, Electrolyte (dangerous potassium), Intoxications (certain drug overdoses), Overload (refractory fluid), and Uremia (e.g., pericarditis). Learn about dialysis options from the NIDDK.

Long-term kidney protection after recovery

  • Keep BP, blood sugar, and cholesterol in target ranges.
  • For albuminuric CKD, ACE inhibitors/ARBs protect kidneys; for diabetes with CKD, SGLT2 inhibitors are often recommended—see KDIGO diabetes & CKD guidance.
  • Quit smoking, moderate salt to ~2 g sodium/day, and maintain a healthy weight and activity level.

Kidney-safe medication habits to adopt now

  • Check labels before you dose. Many cold/flu products contain hidden NSAIDs. The FDA’s guide to OTC medicines can help.
  • Prefer acetaminophen (within safe daily limits) over NSAIDs for most aches if you have CKD—ask your clinician what’s right for you.
  • Tell every provider and pharmacist that you have kidney concerns so they can choose safer options and doses.
  • Get baseline and follow-up labs when starting drugs with known kidney effects.
  • Use “sick-day” rules: during vomiting/diarrhea or fever, ask which meds to temporarily pause to protect kidneys; see general guidance on sick-day rules and confirm locally.

Key takeaways

  • Five common culprits: NSAIDs, PPIs, aminoglycosides, lithium, and certain antivirals.
  • Recognize early signs (reduced urine, swelling, rising creatinine) and act quickly—testing catches problems sooner than symptoms.
  • Treatment centers on stopping the trigger, supporting hydration, managing complications, and, if needed, short-term dialysis.
  • Long-term kidney protection includes BP/diabetes control, avoiding unnecessary nephrotoxins, and regular monitoring.

Your kidneys work hard 24/7—use medicines wisely, watch for warning signs, and partner with your care team to keep them healthy.