Tenofovir disoproxil fumarate and Valtrex 1000 mg: interaction and safety
This source-based reference is not a personal treatment recommendation. The relevance and management of an interaction depend on the exact products, route, dose and clinical situation.
Interaction mechanism
Renal secretion competition and impaired renal clearance can increase antiviral exposure.
Clinical significance and safety
Valtrex 1000 mg is an acyclovir- or valacyclovir-containing systemic antiviral. The TDF label expressly names these agents among medicines whose renal elimination can interact with tenofovir, potentially increasing concentrations and adverse effects. The treating team should assess kidney function and the prescribed antiviral regimen; this record is not a dose-adjustment schedule.
Using this information
This is a source-based reference record, not a recommendation to combine, stop or change medicines. A missing interaction record does not establish safe use. A qualified healthcare professional should consider the exact products, doses, other medicines and individual health circumstances.