Assertion: phenytoin | /r/CapableOf | impair the efficacy of several drugs
Facets:
Source sentences:
text: Phenytoin impairs the efficacy of several drugs, including: anticonvulsants (succinimide and lamotrigine), corticosteroids, coumarin anticoagulants (dicoumarol), cyclosporine, vitamin D, digoxin, disopyramide, doxycycline, frusemide, L-dopa, mexiletine, oestrogens, oral contraceptives (see sections 4.4 and 4.6), quinidine, and xanthines.