What should I avoid before taking a creatinine test?

Before a creatinine test, avoid intense physical activity and high-protein meals for at least 24 hours, as these can raise creatinine levels. Additionally, certain medications, including NSAIDs and diuretics, may temporarily elevate creatinine levels, so inform your doctor about any medications you are taking. You should also stay adequately hydrated, as dehydration can increase creatinine levels by reducing kidney filtration efficiency.