Valerian is a powerful antispasmodic, tonic, and excitant, acting chiefly on the nervous centres. _Used internally_, it is employed in hysteria, nervous languors, and spasmodic complaints generally. It is useful in low fevers. _Doses of various preparations_.--_Powder_, from ten grains to half a drachm, three or four times a day; _tincture_, from two to four drachms; _ammoniated tincture_, from one to two drachms; _infusion_, from two to three ounces, or more.