What are the most common treatments for hyponatremia?

Water restriction. The first line therapy would be to restrict your free water intake each day. You may also be prescribed a higher salt diet or even salt tablets.
Fluid Restriction. Hyponatremia means your body has much more water than sodium. Therefore you are advised to limit your water intake, so the excess water can be urinated out. After a short period of time, your bodyy will naturally go back to perfect electrolyte harmony.