Chronic kidney disease creatinine levels: what they mean

Creatinine is a waste product produced by muscles and cleared from the blood by the kidneys. When filtration changes, creatinine may rise, although hydration, muscle size, diet, recent strenuous activity, and some medicines can also affect the reading.

For chronic kidney disease, the useful question is often how the result changes over time rather than whether one value is above a reference range. Clinicians may use creatinine to calculate an estimated filtration measure, then compare it with urine protein or albumin, blood pressure, and previous tests. A result should not be used by itself to diagnose the cause or predict what will happen.

Keep follow-up blood and urine tests at the interval recommended for you. Take prescribed medicines as directed, and tell the clinician about painkillers, supplements, herbal products, and recent illness before testing. Do not stop a medicine or sharply change fluids without advice.

Managing conditions linked with kidney strain, including Hypertension and Type 2 Diabetes, can be part of the plan. A clinician may also review swelling, urine changes, blood pressure, and symptoms such as Fatigue or Excessive Thirst.

Contact a clinician promptly if you are passing much less urine, develop new or worsening swelling, cannot keep fluids down, become unusually drowsy or confused, or feel breathless. Seek urgent help for severe breathlessness, chest pain, collapse, or a sudden major change in your condition.

Ask what your creatinine trend and estimated filtration measure show, whether urine testing changes the interpretation, and when the next check is due. Ask which medicines or over-the-counter products need review, what blood pressure target applies to you, and which symptoms should trigger an earlier call.