The frequent, and sometimes almost unlimited, use of antacid absorbents, viz. magnesia or chalk, in this disease, is a practice much to be deprecated: compounds are thus formed in the stomach which are positively injurious, and, beyond the temporary relief procured by removing the acid, they tend to aggravate these symptoms, by increasing the state of gastric derangement. The only chemical antacid which should be given in these cases is the carbonate of soda; by this means a compound is formed (the common muriate of soda,) which of all others is most grateful to the stomach, and which, from its gently laxative effects, is well adapted to keep up a healthy action of the bowels. It is scarcely credible to what extent the use of antacids may be carried to relieve the cardialgia of pregnancy. Dr. Dewees mentions having attended a lady with several children, "who was in the constant habit of eating chalk during the whole term of pregnancy; she used it in such excessive quantities as almost rendered the bowels useless. We have known her many times not to have an evacuation for ten or twelve days together, and then only procured by enemata, and the stools were literally nothing but chalk. Her calculation, we well remember, was three half pecks for each pregnancy. She became as white nearly as the substance itself, and it eventually destroyed her, by deranging her stomach so much that it would retain nothing whatever upon it." (_System of Midwifery_, § 275.) The _constipation, flatulence, colicky pains, and headach, the spasmodic cough, palpitation, toothach_, &c. are symptoms arising from the same cause, a knowledge of which circumstance will influence our treatment of them more or less. Still, however, the indications are the same, viz. to restore and keep up a healthy action of the stomach and bowels. Thus, we frequently find that a severe headach, obstinate cough, or attacks of palpitation, are relieved by aperient medicines; that toothach may be relieved, or even removed, by occasional doses of carbonate of soda, or by blue pill and aperient tonics. Indeed, it is a question in many cases, whether it is proper to extract a carious tooth under these circumstances, for the shock which it produces is sometimes so great as to run the risk of exciting abortion; and in many instances we might extract every tooth on the painful side, and yet not relieve the suffering which arises from nervous pain induced by gastric irritation, and, if carefully examined, the pain will be found to be not confined to a single tooth but to spread over the whole side of the face, darting from the edge of the ear, and extending even to the forehead. The breath is usually sour, and the acid state of the saliva is indicated by the instantaneous reddening of litmus paper laid upon the tongue; in many cases there is at the same time a considerable deposit of lithic acid observed in the urine.