Are water pills good or bad? Water pills or diuretics are both good AND bad! They are good if you use them in the manner they are intended to be used. Water pills are bad if you use them to lose weight because they are never intended to be a diet pill you can pop to your mouth and magically transform you into a svelte Nicole Kidman.
So when is the use of water pills or diuretics advisable? You have to consult your doctor regarding this matter but, in general, they are used to treat high blood pressure, glaucoma, edema, congestive heart failure (CHF), and some kinds of kidney and liver disease.