Medications that work on the central nervous system, such as antidepressants, can also mess with your cycle.

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Cyber warfare has already been unleashed on the computers that form the central nervous system of today's grid.

CENTERFORSECURITYPOLICY: An avoidable catastrophe

Smokeless nicotine, ingested via a skin patch, is less than ideal because its effects on the body are too broad to treat diseases of the central nervous system such as Alzheimer's.

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Chief among the contenders are a series of drugs that affect the central nervous system, with a new antidepressant and an anti-anxiety drug on deck.

FORBES: Magazine Article