Final answer:
In cases where SIADH is resistant to fluid restriction, medication can be used to help manage the condition. One of the medications used in this scenario is called tolvaptan.
Step-by-step explanation:
SIADH (syndrome of inappropriate antidiuretic hormone) is a condition where the body produces too much antidiuretic hormone (ADH), leading to excessive water retention. In cases where SIADH is resistant to fluid restriction, medication can be used to help manage the condition. One of the medications used in this scenario is called tolvaptan. Tolvaptan is a vasopressin receptor antagonist that works by blocking the effects of ADH, thereby reducing water reabsorption and increasing urine output.