Urine Sodium

You should get a urine sodium test if your blood sodium is abnormal, or if you have signs of dehydration, reduced urine output, swelling, or acute kidney injury. It is also recommended for evaluating SIADH, adrenal disorders, heart failure, or cirrhosis, and for monitoring patients on diuretics or IV fluid therapy.

No fasting is required for a urine sodium test. Collect a clean, midstream urine sample in a sterile container. Follow your usual diet and fluid intake unless advised otherwise. Ideally, give the sample before diuretics or IV fluids, and inform your doctor about any medicines, as these can affect results.

No, fasting is not required for a urine sodium test. You can eat and drink normally before giving your sample. Collect a clean, midstream urine sample, preferably before diuretics or IV fluids are given. Inform your doctor about any medicines, as they can affect the results.