[The possibility of the development of isosorbide dinitrate and nifedipine withdrawal syndromes in patients with stable stenocardia of effort]. / Vozmozhnost' razvitiia sindroma otmeny izosorbida dinitrata i nifedipina u bol'nykh stabil'noi stenokardiei napriazheniia.

ABSTRACT

Exercise tests were performed in 18 patients with stable angina of effort treated with isosorbide dinitrate (ID) or nifedipine (NF) to see whether sharp discontinuation of the above drugs may entail withdrawal syndrome. Exercise tolerance declined 21 and 24 hours after the last administration of NF, 13 and 18 hours after that of ID. Compared to NF, ID tolerance decreased in a less degree. Some of the patients experienced myocardial ischemia in the course of the exercise tolerance tests, there were more frequent anginal episodes, arterial pressure rose. For ID withdrawal syndrome manifested weaker than for NF.