 [ Symptoms ] stopped a low dose blood pressure med wdiuretic in 1 week of stopping i have gained 5 lbs & have swollen legsankles do i need to go on a diuretic [ Disease ] a quart of water fluid weighs over 2 pounds so it is highly likely that you need that diuretic and perhaps need to watch your sodium salt intake you should not stop your bp medications unless you get the okay from your medical provider swollen ankles may not be your only problem you blood pressure may be elevated again