Apart from rare allergic reactions, the only recognized side effect of long term treatment with diuretics is potassium depletion (which can be prevented by increasing intake of potassium).
A consequence other than the one(s) for which an agent or measure is used, as the adverse effects produced by a drug, especially on a tissue or organ system other than the one sought to be benefited by its administration.
Increasing the excretion of urine.
Agents that promote the excretion of urine.
A metallic element of the alkali group, many of whose salts are used in medicine. Potassium is the chief positively-charged ion of muscle and most other cells (intracellular fluid).