44 The Philadelphia P(5Lyulinic. [February 3, NITRO GLYCERIN AND THE NITRI- . TIS IN ARTERIO SCLEROSIS. By Augustus A. Eshner, M. D., ADJUNCT PROFESSOR OF CLINICAL MEDICINE IN THE PHILADELPHIA POLYCLINIC. The results obtained from the administra- tion of nitro-glycerin or the nitrites in cases of arterio-sclerosis, of which common symp- toms are apparently causeless shortness of breath, cardiac palpitation and arhythmia, with accentuation of of the second sound and sometimes a booming first sound, tense, resistant and tortuous arteries, vertigo, cold- ness of the extremities, paresthesia?, impaired memory, impaired motor power, heightened reflexes, tremor, are sometimes quite re- markable. In these cases I ordinarly prescribe one drop of a centesimal solution of nitro-glycer- in, to be taken thrice daily, the dose to be in- creased one droj) every day, or every second or third day, according to the state of the vessels and the individual susceptibility. Of the nitrites, sodic or potassic, I administer 1894.] The Philadelphia Polyclinic. 45 two and a-half grains thrice daily. This dose may likewise be cautiously increased. I am convinced that this medication, in con- junction with a suitable regime, is not merely palliative. In one case in particular the improve- ment in the subjective symptoms following the taking of nitro-glycerin for a few days was so pronounced as to occasion the re- mark on the part of the patient that he could not have realized that so much could be accomplished in so short a time with so small a dose of medicine.