HYDBARGYRI CHLORIDUM MITE 203 



Internal. — Calomel is a purgative, intestinal antiseptic, 

 chologogue, diuretic and alterative. It is also used for its 

 remote antiphlogistic effects. It is particularly adapted to 

 dogs, and is given in a single dose, or often, to better advan- 

 tage, in half-grain doses, repeated every two hours till 

 purgation occurs. For diarrhoea or vomiting in dogs, 

 calomel is useful in removing the source of irritation, in 

 being antiseptic and easily borne by an irritable stomach. 

 Calomel is partially transformed, by the alkaline secretions 

 of the bowels, into the mercurous oxide, and it is to this salt 

 that its purgative action is due. Combination with sodium 

 bicarbonate assists in this transformation, and is commonly 

 practised. The administration of calomel should be followed 

 by oil, salines or other cathartics, if purgation does not 

 occur within twenty-four hours after its ingestion, otherwise 

 mercurialism may occur. 



In heptogenous jaundice, with light-colored faeces, owing 

 to hepatic congestion, gastro-duodenitis or constipation, 

 calomel is a valuable remedy for dogs, followed by the use 

 of nitro-muriatic acid. In the jaundice occurring as a form 

 of influenza in horses, nitro-muriatic acid is more effective. 

 Calomel is one of the best remedies for the treatment of 

 dysentery, unless there is great weakness. It should be 

 continued in repeated small doses till the character of the 

 discharge changes. Foals and calves, with indigestion and 

 diarrhoea, may be given calomel to advantage to remove the 

 source of irritation in the digestive tract. Calomel must be 

 combined with a small dose of aloes, or with linseed oil, to 

 form an effective cathartic for the horse. As aloes acts on 

 the large, and calomel on the small, intestines, the above 

 combination secures a general purgative influence. 



Cattle are given calomel, followed by the administration 

 of salines, to produce free catharsis. As a remedy for round 

 worms, I to 5 grain each of santonin and calomel, with 5 

 grains of sugar of milk, are administered to dogs four times, 

 at half hour intervals, and followed by castor oil. Liimbri- 

 coid worms in the horse, may be treated by conjoining 2 



