side effect

DEFINITION:

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.

diuretics

DEFINITION:

1. Increasing the excretion of urine.
2. Agents that promote the excretion of urine.

potassium

DEFINITION:

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).