HYDRARGYRUM. 



HYOSCYAMUS. 



31 



Other less important preparations of Mercury are: the Red Iodide, the Red 

 Oxide, and the Salicylate. 



HYDRASTIS. 



Hydrastis, or Golden Seal, consists of the dried rhizome and roots of Hydrastis 

 canadensis (Fam. Ranunculacecc), perennial herb, native to Northern United States 

 and Canada. It owes its activity to an alkaloid, hydrastine (C2iH2iO6N). 



Properties: 

 Hydrastis : 



Appearance 



Color 



Odor 



Taste .. 



Hydrastin HC1: 



Appearance 



Color 



Odor 



Taste .. 



Incompatibilities: To Tincture Hydrastis add 



An alkali 



Ac. Tannic 



A carbonate .. 



A borate .. 

 An iodide 



Hydrastis acts as a mild stimulant irritant to mucous membrane. Average dose, 

 2 Gm. ; Hydrastinse Hydrochloridum, o.oi Gm. 



Other official preparations are: Hydrastine, Hydrastinine Hydrochloride, the 

 Extract, Fluidextract, Glycerite, and Tincture. 



HYOSCYAMUS. 



Hyoscyamus, or Henbane, consists of the dried leaves and flowering tops of Hyos- 

 cyamus niger (Fam. Solanacece'), a biennial herb native to Eurasia, but cultivated in 

 England and North America. 



Properties: 



Hyoscyamus possesses two alkaloids fairly common to the Solanacece Hyoscy- 

 amine and Hyoscine (or Scopolamine). To these alkaloids the drug owes its chief 

 activity. Hyoscyamine is a peripheral paralyzant similar to atropine, while Scopola- 

 mine is a cerebral sedative. Dose of Hyoscyamus, 0.25 Gm. ; of Hyoscyamine Hydro- 

 bromide, 0.0003 Gm. ; of Scopolamine, 0.0003 Gm. 



Official preparations of Hyoscyamus are: the Extract, Fluidextract, and Tincture. 



