ADH (antidiuretic hormone) tells the kidney to hold on to water. These two disorders are exact opposites. Too much ADH (SIADH) makes you keep water. Too little ADH (Diabetes Insipidus) makes you dump it. Click each one.
Water in the body
Watch whether the body holds water in, or floods it out into the urine.
Pick a disorder.
Pick a disordertoo much vs too little ADH
What's happening
SIADH (too much)
Water is held back → diluted blood, LOW sodium, concentrated urine, fluid overload, weight gain.
DI (too little)
Water is lost → dehydration, HIGH sodium, huge volumes of dilute urine, intense thirst.