The rhizome and rootlets of Valeriana officinalis.

Characters. - A short, yellowish-white rhizome, with numerous fibrous roots about two or three inches long; of a bitter taste and penetrating odour, agreeable in the recent root, becoming fetid by keeping; yielding volatile oil and valerianic acid when distilled with water.

Composition. - Contains a volatile oil and valerianic acid.

Preparations.

B.P.

Dose.

Infusum Valerianae (2 dr. in 1/2 pint)...........................................................

1-2 fl. oz.

Tinctura ,, (2 1/2 oz. in 1 pint spirit) ..............................................

1-2 fl. dr.

„ „ Ammoniata (2 1/2 oz. in 1 pint aromatic spirit of ammonia) .........................................

1/2-1 1/2 fl. dr.

U.S.P.

Abstractum Valerianae...................................................................................

15-45 gr.

Extactum ,, Fluidum.......................................................................

15-30 min.

Tinctura ,, (20 per cent.)..............................................................

1-2 fl. dr.

„ „ Ammoniata (20, in aromatic spirit of ammonia up to 100).................................................

1-2 fl. dr.

Oleum Valerianae .........................................................................................

One or more drops

Quininae Valerianas .......................................................................................

1-2 gr.