![]() |
|
|
1 The Edward Mallinckrodt Department of Pharmacology, Washington University School of Medicine, St. Louis, Missouri
Tolerance to the blood pressure response of glyceryl trinitrate (GTN) was produced by administration of high doses of GTN three times a day (s.c.). The induction of tolerance was found to be time- and dose-dependent and was reversible with time upon withdrawal from GTN pretreatment. The tolerance phenomenon was present in vascular smooth muscle removed from GTN-treated animals but could not be induced in aorta strips in vitro. There was a parallel shift in the responsiveness of blood pressure and thoracic aorta strip preparations to challenging doses of GTN during tolerance development. On the other hand, tolerance was not produced in uterus or ileum strips from animals treated in vivo with GTN, even though these tissues are normally responsive to GTN.
Submitted on June 9, 1969
This article has been cited by other articles:
![]() |
J. D. Parker and J. O. Parker Nitrate Therapy for Stable Angina Pectoris N. Engl. J. Med., February 19, 1998; 338(8): 520 - 531. [Full Text] [PDF] |
||||