⚠️ 8 Medicines That Can Harm the Kidneys—What You Should Know

The claim that there are “eight pills you should never take” is misleading. Many medicines can be used safely when properly prescribed and dosed. The risk depends on the drug, dose, duration, kidney function, dehydration, and other medicines you’re taking.

Here are eight medication groups worth discussing with a doctor or pharmacist, particularly if you have kidney disease:

Ibuprofen — an NSAID that can reduce blood flow to the kidneys, especially with high doses or prolonged use.
Naproxen — another NSAID with similar kidney risks.
Diclofenac — an NSAID that can worsen kidney function, particularly with long-term use.
Meloxicam — an NSAID that requires caution in people with reduced kidney function.
Celecoxib — a prescription NSAID that can also affect kidney blood flow.
High-dose aspirin — aspirin at pain-relieving doses can affect the kidneys; low-dose aspirin prescribed for cardiovascular protection is a different situation. (National Kidney Foundation)
Lithium — long-term treatment can affect kidney function and requires monitoring. (National Kidney Foundation)
Some antibiotics, antifungals and antivirals — certain drugs in these groups can accumulate when kidney function is reduced or can directly injure the kidneys; doctors may need to adjust the dose according to eGFR. (National Kidney Foundation)

🚨 A particularly important warning

NSAIDs are the biggest everyday concern. Ibuprofen and naproxen can cause acute kidney injury, particularly if you’re dehydrated, have chronic kidney disease, heart disease, or high blood pressure, or take them at high doses or for long periods. (NIDDK)

Also, don’t assume that a medicine is dangerous simply because it appears on an internet list. ACE inhibitors and ARBs, for example, can temporarily affect kidney blood tests but are often prescribed specifically because they can protect kidney function and slow CKD progression. (NIDDK)

Never stop a prescribed medication on your own. If you’re concerned about a particular pill, give me its name and dose, and I can explain its kidney risks and what monitoring is normally recommended.