The pharmacokinetics of trinitroglycerin and its metabolites in patients with chronic stable angina.
OBJECTIVE
To study the pharmacokinetics of trinitroglycerin (GTN) and its four metabolites in angina patients during their transient use of transdermal GTN tape following intravenous administration of GTN.


METHODS
Four patients received a GTN tape following intravenous administration of 0.1 microg kg-1 min-1 GTN, and the other four patients received two GTN tapes following intravenous administration of 0.2 microg kg-1 min-1 GTN.


RESULTS
Plasma concentrations of GTN in both groups during tape application showed a slight decrease for the hour after the application of the tape and then were con- stant for 24 h. In contrast, the concentrations of dinitroglycerins (GDNs) and mononitroglycerins (GMNs) depended on the duration of previous intravenous administration of GTN. Neither significant cardiovascular changes nor undesirable complications were observed during the study.


CONCLUSIONS
The results suggest that appropriate replacement of intravenous GTN administration with transdermal tape application could maintain a therapeutic GTN level.
Hashimoto
S
S
Department of Intensive Care, Kyoto Prefectural University of Medicine, Kyoto, 602, Japan. satoru@koto.kpu-m.ac.jp
Yamauchi
E
E
Kobayashi
A
A
Shigemi
K
K
Tsuruta
H
H
Yamashita
T
T
Tanaka
Y
Y
D000368:Aged; D000369:Aged, 80 and over; D000787:Angina Pectoris / Q000378:metabolism*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D005996:Nitroglycerin / Q000031:analogs & derivatives* / Q000378:metabolism / Q000493:pharmacokinetics*; D014665:Vasodilator Agents / Q000378:metabolism / Q000493:pharmacokinetics*
D014665:Vasodilator Agents; C014509:dinitroglycerol; D005996:Nitroglycerin