Nervine

Nervine was a patent medicine tonic produced in 1884 by Dr. Miles Medical Company (now Miles Laboratories). It is a cognate of 'Nerve', and the implication was that the material worked to calm nervousness.
Modern Usage.
In the late 20th and early 21st century, promulgators of alternative medicine and herbalism have begun to use the term Nervine as an adjective. This is not a term used by mainstream/accepted medicine, where anxiolytic is the preferred term.