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One of the most prominent of these is the antidiuretic hormone, or ADH.

A number of medical conditions – notably a rather common one called the syndrome of inappropriate antidiuretic hormone, and medical treatment in general – are associated with the potential for low blood sodium, or hyponatremia.

Alcohol inhibits an antidiuretic hormone that would normally send some of the fluid you’re consuming back into the body, and instead sends it to your bladder.

Vasopressin -- also known as antidiuretic hormone -- helps regulate the body's water retention.

Children whose bladders tend to spasm can be treated with anticholinergic drugs, and children who lack an antidiuretic hormone can take a synthetic version.