Are diuretics good or bad

Answer 1

They are not inherently either. They can be good if they are used properly. For example, because diuretics increase urine output and decrease blood volume, if someone with high blood pressure takes some prescribed diuretics they can decrease their blood volume and thus their blood pressure. This can be very beneficial.

However, if someone already has a blood pressure that is too low, possibly after they have been bleeding out, then taking diuretics would further decrease their BP and this could result in insufficient blood flow to the brain resulting in syncope, brain damage, or death