Does Valganciclovir Interact with Lamivudine And Tenofovir Disoproxil Fumarate?
Valganciclovir and Lamivudine And Tenofovir Disoproxil Fumarate have a moderate drug interaction according to U.S. FDA drug labeling data. May increase serum tenofovir concentrations and/or increase concentrations of other renally eliminated drugs. The mechanism involves competes for active tubular secretion in kidneys. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.
- Severity
- Moderate
- Valganciclovir Class
- Cytomegalovirus Nucleoside Analog DNA Polymerase Inhibitor
- Lamivudine And Tenofovir Disoproxil Fumarate Class
- Hepatitis B Virus Nucleoside Analog Reverse Transcriptase Inhibitor
- Management
- Monitor for effects
- Data Source
- U.S. FDA via OpenFDA
How This Interaction Works
The interaction between Valganciclovir and Lamivudine And Tenofovir Disoproxil Fumarate occurs because competes for active tubular secretion in kidneys. Clinically, this means may increase serum tenofovir concentrations and/or increase concentrations of other renally eliminated drugs. This is classified as a moderate interaction. While it may not require stopping either medication, your healthcare provider should be aware you are taking both so they can monitor for potential effects and adjust treatment if necessary.
What To Tell Your Doctor or Pharmacist
If you are taking Valganciclovir and your doctor is considering prescribing Lamivudine And Tenofovir Disoproxil Fumarate (or vice versa), make sure to:
- Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
- Ask whether the benefits of combining these medications outweigh the risks for your specific situation
- Ask what symptoms to watch for that would indicate the interaction is causing problems
- Ask whether any dosage adjustments are needed
- Never stop or change either medication without first consulting your healthcare provider