An Antidiuretic Hormone (ADH) test measures the level of ADH in your blood. It's used to evaluate water balance, kidney function, and to diagnose certain medical conditions related to ADH imbalances, according to medical websites like Healthline and MedlinePlus. Why is an ADH test performed? Diagnosing Diabetes Insipidus: ADH deficiency can cause diabetes insipidus, a condition where the body excretes excessive amounts of diluted urine. Diagnosing SIADH: Excess ADH can lead to Syndrome of Inappropriate Antidiuretic Hormone (SIADH), where the body retains too much water, leading to low sodium levels and other symptoms. Assessing Water Balance: The test can help assess the body's ability to regulate water balance, especially when symptoms like excessive urination or thirst are present. Monitoring Treatment: ADH testing can be used to monitor the effectiveness of treatments for conditions related to ADH imbalances. Investigating Symptoms: The test can be ordered if you experience symptoms like nausea, headaches, disorientation, or low sodium levels, which could be related to ADH imbalances. How is the test performed? Blood Sample: The ADH test is a blood test. A healthcare professional will draw blood from your vein using a needle. Laboratory Analysis: The blood sample will then be sent to a laboratory for analysis to measure the ADH levels. No Special Preparations: There are usually no special preparations needed before the test, says Sprint Diagnostics. Normal Range: The normal range for ADH can vary slightly between laboratories, but generally, it's between 1-5 picograms per milliliter (pg/mL) for adults. Healthline notes that normal ranges can vary slightly among different laboratories. Medical News Today says that normal ADH levels for adults are less than 4.3 pg/mL. What if my ADH levels are outside the normal range? High ADH: Can indicate SIADH, certain types of cancer, brain tumors, or heart failure. Low ADH: Can indicate diabetes insipidus, excessive water intake, low serum osmolality, or certain medications. In Pimpri Chinchwad Pune Exploring Truth... NIDAN Pathology Laboratory ISO 9001:2015 Certified Book Free Home Collection : 7775837228/8999989854 Email Id: nidanpathology331@gmail.com Rupeenagar Chakan | Punawale Wakad | Pimpari | Krushnanagar | Ravet