Interaction between digoxin and indomethacin or ibuprofen.
To study a potential interaction between digoxin and two non-steroid anti-inflammatory drugs, indomethacin (50 mg three times daily) and ibuprofen (600 mg three times daily) were given for 10 days to 10 and 8 patients, respectively, on chronic digoxin treatment. Serum digoxin measured by fluorescence polarisation immunoassay increased significantly (P less than 0.05) during treatment with indomethacin from pre-treatment values of 0.73 +/- 0.34 nmol l-1 (mean +/- s.d.) to a mean value of 1.02 +/- 0.43 nmol l-1, while administration of ibuprofen did not change the steady state serum concentration of digoxin. The result demonstrates that some non-steroidal anti-inflammatory drugs such as indomethacin increase serum digoxin to levels high in the therapeutic range. This should be taken into consideration when co-administering other drugs known to increase the serum concentration of digoxin such as several antiarrhythmics.
Jørgensen
H S
HS
Medical Department P, Bispebjerg Hospital, Copenhagen, Denmark.
Christensen
H R
HR
Kampmann
J P
JP
D000368:Aged; D000369:Aged, 80 and over; D004077:Digoxin / Q000097:blood*; D004347:Drug Interactions; D005260:Female; D016231:Fluorescence Polarization Immunoassay; D006801:Humans; D007052:Ibuprofen / Q000494:pharmacology*; D007213:Indomethacin / Q000494:pharmacology*; D008297:Male; D008875:Middle Aged
D004077:Digoxin; D007052:Ibuprofen; D007213:Indomethacin