HYOSCYAMUS. 307 



From the Extract is prepared : 

 Pilula Colocynthidis et Hynap.yfyijri, 1 in 3. 



2. Succus Hypaf-yami, 3 of fresh, juice to 1 of Spirit. 

 Dose, % to 1 fl.dr. 



3. Tinctura Hyoscyami. 1 in 8. Dose, 15 to 60 min. 



ACTION AND USES. 



These closely agree with the action and uses of bella- 

 donna and stramonium. The special points to be noted in 

 connection with hyoscyamus are as follows : 1. The pharma- 

 ceutical preparations of the plant are decidedly weaker in their 

 action, and must be given in larger doses, than those of stra- 

 monium. 2. The secondary or calmative effect of the atro- 

 paceous plants on the" con volutions is more rapid and pronounced 

 with hyoscyamus, which is used in maniacal excitement, and as 

 an anodyne and hypnotic to children. 3. The laxative andj 

 carminative effects on the bowel are decided, and hyoscyamusf 

 is often combined with purgative pills. 4. The remote local 

 action on the urinary organs is more marked, so that the 

 tincture relieves irritability of the bladder from any cause. 



Duboisia (Not Officinal). Ax. alkaloid derived 

 from an Australian plant. Duboisia myoporoides, and 

 identical with Hyoscyamia. 



Sulphate of Duboisia, in golden-yellow scales, is more 

 powerful than the atropia salt, and may be used as a mydriatic, 

 in the form of a solution, 1 gr. to the ounce. Stronger solu- 

 tions are apt to produce general toxic effects. 



llomatromii (Not Officinal). A derivative of 

 Atropia. Its action is similar to that of atropia, though 

 weaker. 



It is used only in ophthalmic practice, its advantage being, 

 that whilst it acts as promptly though not so energetically as 

 atropia, its effects subside in about one-fourth the time. 



Tabaci Folia LEAP TOBACCO. The dried 

 leaves of Virginian Tobacco, Nicotiana tabacum. 

 Cultivated in America. 



Characters. Large mottled-brown ovate or lanceolate 

 acuminate leaves, bearing numerous short glandular hairs; 



