MATERIA MEDICA AND THERAPEUTICS. 247 



Hypodermatic injections produce no systemic effects unless 

 enormous quantities are used, which are very dangerous. It 

 kills by paralyzing the heart. 



The drug may be also used to check hemorrhages, but for 

 large blood vessels, it should not be depended on, as secondary 

 hemorrhages may occur after the effects have worn off. 



It does not act when general anaesthetics have been used. 



As a heart stimulant this agent must be administered in- 

 travenously. 



In human practice Adrenal Extract in conjunction with 

 Normal Salt Solution (0.6%) is being used to revive people who 

 have succumbed to anaesthetics, drowning, electricity, shock from 

 various causes, etc., etc. 



It is used locally to check bleeding from the nose; in hay- 

 fever; acute coryza; conjunctivitis, etc. 



Internally in addison's disease, diabetes insipidus and for 

 conditions marked by loss of vaso-motor tone. — Its effects when 

 administered by the stomach however are very slight. 



THYROID GLANDS. 



Commercial Preparations : — 



thyroids, desiccated. (Armour's.) 



Dose. — Dogs, 2 to 5 grs. cautiously increased to 10 grs. ; 

 horses, yi to 2 drs. 



thyroids, desiccated. (Parke, Davis & Co.) 



Dose. — Same. 



Also in tablets and capsules containing 2 grains of dried 

 thyroid gland equal to 10 grains of fresh thyroid gland of sheep. 



glycerin extract of thyroid gland. 



Dose. — Dogs, 15 to 60 minims. 



thyradEn. (Merck & Go.) 



Standardized dried extract of Thyroid Gland. 1 part equals 

 2 of fresh gland. — A brownish sweet powder. 



D se. — Dogs, 2 to 5 grs. ; puppies, % to 34 as much ; horses, 

 y 2 to 2 drs., may be procured in 2 gr. tablets. 



thyroidin. (Merck & Co.) 



Dried extract of sheep thyroid. 1 part equals 6 of fresh 



gland; 



Dose.— Dogs, /a to2 grs.; horses, 10 to 30 grs. 



