Many medicines and supplements can affect kidney function, especially in people who are older, dehydrated, or already have kidney problems. A warning like “this could be affecting your kidneys” is important—but the specific substance matters.
Common things that may affect the kidneys include:
1. Certain pain relievers (NSAIDs)
Examples:
- Ibuprofen
- Naproxen
These can reduce blood flow to the kidneys in some people, especially with frequent use, high doses, dehydration, or existing kidney disease.
2. Some blood pressure medicines
Certain medications require kidney monitoring because they can change kidney function or potassium levels.
3. Some antibiotics and other prescription medicines
Certain drugs may need dose adjustments based on kidney function.
4. Herbal supplements and high-dose vitamins
“Natural” does not always mean risk-free. Some supplements can contain ingredients that stress the kidneys or interact with medications.
5. Excessive use of supplements
Very high doses of certain nutrients (for example, some minerals or fat-soluble vitamins) can be harmful if taken unnecessarily.
Signs that may need medical attention:
- Swelling in the feet, ankles, or around the eyes
- Noticeable changes in urination
- Blood in the urine
- Unusual fatigue or weakness
- Nausea, vomiting, or confusion
- Persistent itching or shortness of breath
Do not stop a prescribed medication without speaking with your healthcare professional. If you tell me the name of the medicine or supplement you are referring to, I can explain whether it is known to affect the kidneys and what precautions are usually recommended.
