Foscarnet has 5 known drug interactions based on U.S. FDA drug labeling data. Of these, 2 are contraindicated combinations that should be avoided entirely. 1 are classified as major interactions requiring close medical supervision. Notable interactions include combinations with Cidofovir, Cidofovir Anhydrous, Pentamidine Isethionate. Patients taking Foscarnet 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
- Contraindicated
- 2
- Major
- 1
- Moderate
- 2
Contraindicated (2)
- Foscarnet + Cidofovir— Concomitant administration is contraindicated due to nephrotoxic potential. Must be discontinued at least 7 days prior t…
- Foscarnet + Cidofovir Anhydrous— Concomitant administration of cidofovir and foscarnet is contraindicated due to nephrotoxic potential. Must be discontin…
Major (1)
- Foscarnet + Pentamidine Isethionate— Concomitant or sequential use may have additive nephrotoxic effects; should be closely monitored and avoided if possible…
Moderate (2)
- Foscarnet + Vasopressin— Suspected of causing diabetes insipidus; may decrease pressor and antidiuretic effects of vasopressin. Hemodynamic monit…
- Foscarnet + Vasopressin In 0.9% Sodium Chloride— May cause diabetes insipidus, decreasing pressor and antidiuretic effects of vasopressin. Hemodynamic monitoring recomme…