If you take any of these medicines, let your doctor know:
- Cephalosporin antibiotics, such as cephalexin and cefuroxime
- Nonsteroidal anti-inflammatory drugs (NSAIDs), such as aspirin or ibuprofen
- Chemotherapy drugs
You may be asked by your doctor to stop taking your medicines or do some dosage adjustments before the test. The doctor will also take that into account when evaluating the test results.
Serum Creatinine Test: Understanding the Results
Creatinine is expressed in milligrams per blood deciliter (mg/dL). People who are more on the muscular side tend to have higher levels of creatinine. Results can also vary based on age and gender.
But in general, normal levels of creatinine range from 0.9 to 1.3 mg/dL in men, and from 0.6 to 1.1 mg/dL in women aged 18 to 60. Normal levels for people over 60 are about the same.
If you get high levels of serum creatinine in the blood, it could be a sign that your kidneys are not working properly.
Your serum creatinine levels may be slightly higher or higher than normal, because of possible conditions like:
- Kidney problems, such as kidney damage or infection
- A high-protein diet
- A reduced flow of blood to the kidneys due to congestive heart failure, shock, or complications of diabetes
- A blocked urinary tract
If your creatinine is really high and is caused by an acute or chronic kidney injury, the amount will not decrease until the problem is resolved. If it was briefly or wrongly elevated due to dehydration, a very high protein diet, or the use of supplements, then the amount will be reduced by removing such factors. A person receiving dialysis, after treatment, will also have lower levels.