<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been feeling very fatigued and nauseous lately. Ive also noticed that Ive been drinking a lot of water but not urinating as much as usual.  <response>: Based on your symptoms, its possible that you may have Syndrome of inappropriate secretion of ADH SIADH. Well need to conduct a few medical tests to confirm this. Well start with hematologic tests like a complete blood count CBC to check for any abnormalities in your blood. Well also need to measure your glucose levels, conduct a urinalysis, and do a plain x-ray. Additionally, we may need to give you intravenous fluid replacement and measure your hemoglobin A1c levels through a hemoglobin A1c test. 