The Effect of Different Oral Anticoagulants on Diphenylhydantoin (DPH) and Tolbutamide Metabolism

Autor: L. Skovsted, J. Mølholm Hansen, M. Kristensen, Siersbaek-Nielsen K
Rok vydání: 2009
Předmět:
Zdroj: Acta Medica Scandinavica. 199:513-516
ISSN: 0001-6101
DOI: 10.1111/j.0954-6820.1976.tb06772.x
Popis: The effect of bishydroxycoumarin, phenprocoumon, warfarin and phenindione on the metabolism of diphenylhydantoin (DPH) and tolbutamide has been studied in 54 patients. The half-lives of DPH and tolbutamide in blood following i.v. injections were studied in 33 patients before and after one week of anticoagulant treatment. Bishydroxycoumarin increased the mean half-life values of DPH from 8.8 to 37.4 hours and of tolbutamide from 4.9 to 17.5. Phenprocoumon prolonged DPH half-life from a mean value of 9.9 to 14.0 hours but did not change the tolbutamide half-life. Warfarin and phenindione did not affect DPH or tolbutamide half-lives. Steady state concentration studies in 21 patients showed a rise in serum DPH during bishydroxycoumarin and phenprocoumon treatment but not during treatment with warfarin and phenindione. A rise in serum tolbutamide was noted during treatment with bishydroxycoumarin. These findings suggest that bishydroxycoumarin inhibits the betab-olism of DPH and tolbutamide and that phenprocoumon inhibits DPH metabolism. No effect on DPH and tolbutamide metabolism could be demonstrated following administration of warfarin and phenindione.
Databáze: OpenAIRE