Answer:
"They can cause water loss."
Explanation: Diuretics are medications that promote the removal of excess sodium and water from the body through urine, which can lead to a decrease in fluid retention and result in increased urine output. This process can lead to a reduction in overall body water content and is why diuretics are commonly used to treat conditions such as hypertension (high blood pressure) and edema (fluid retention). The other statements are generally not true:
Diuretics do not cause weight gain; they typically have the opposite effect by promoting water loss.
While some individuals may experience nausea as a side effect of diuretics, it's not a universal or inherent effect of all diuretic medications.
Diuretics are not known to weaken the immune system. In fact, they can help manage certain conditions that may be associated with fluid retention and high blood pressure.