Sulfaphenazole has 5 known drug interactions based on U.S. FDA drug labeling data. Notable interactions include combinations with Fosphenytoin Sodium, Methenamine Hippurate, Phenytoin. Patients taking Sulfaphenazole should inform their healthcare provider of all current medications — including over-the-counter drugs and supplements — to avoid potentially harmful combinations. Data sourced from OpenFDA and the NIH National Library of Medicine.
- Total
- 5
- Moderate
- 4
Moderate (4)
- Sulfaphenazole + Fosphenytoin Sodium— May increase phenytoin serum levels; monitoring of phenytoin levels recommended.
- Sulfaphenazole + Methenamine Hippurate— Concomitant administration may result in precipitate formation in the urine.
- Sulfaphenazole + Phenytoin— May increase phenytoin serum levels; monitoring of phenytoin levels recommended.
- Sulfaphenazole + Phenytoin Sodium— May increase phenytoin serum levels; monitoring of phenytoin levels recommended.