NCIt definition : The hydrochloride salt of amiloride, a synthetic pyrazine derivative with antikaliuretic
and diuretic properties. Amiloride inhibits sodium channels located in the distal
tubules and collecting ducts of the kidney, thereby preventing the absorption of sodium
and increasing its excretion along with water, to produce naturesis. In response to
the hypernatremic conditions in the kidney, the plasma membrane becomes hyperpolarized
and electrochemical forces are reduced, which then prevents the excretion of potassium
and hydrogen into the lumen.;