Valacyclovir interactions
Valacyclovir (Valtrex), an antiviral has 3 documented interactions across the FDA labels and fact sheets we index: 1 major, 1 moderate, 0 minor, and 1 where a label reports no significant interaction. Each entry below quotes the sentence behind it. This drug page is a starting point, not a verdict for your situation.
Major interactions (1)
VALTREX is contraindicated in patients who have had a demonstrated clinically significant hypersensitivity reaction [e.g., anaphylaxis, severe cutaneous adverse reactions (SCARs)] to valacyclovir, acyclovir, or any component of the formulation [see Warnings and Precautions ( 5.4 ), Adverse Reactions ( 6.3 )] . (Valacyclovir label, Contraindications)
Moderate interactions (1)
- Emtricitabine and tenofovirantiretroviralModerate
Some examples of drugs that are eliminated by active tubular secretion include, but are not limited to, acyclovir, cidofovir, ganciclovir, valacyclovir, valganciclovir, aminoglycosides (e.g., gentamicin), and high-dose or multiple NSAIDs [see Warnings and Precautions (5.4) ] . (Emtricitabine and tenofovir label, Drug interactions)
No significant interaction reported (1)
- MycophenolateimmunosuppressantNo interaction
Examples Acyclovir, ganciclovir, probenecid, valacyclovir, valganciclovir Combination Oral Contraceptives Clinical Impact Concomitant use with mycophenolate mofetil decreased the systemic exposure to levonorgestrel, but did not affect the systemic exposure to ethinylestradiol [see Clinical Pharmacology ( 12.3 )] , which may result in reduced combination oral… (Mycophenolate label, Drug interactions)
Check Valacyclovir against everything you take. Add your full list; every pair is checked at once.
Open in the checkerNot medical advice. Severity reflects the label's wording, not your circumstances. A "major" flag can be routine under supervision and a "minor" one can matter at high doses. Ask a pharmacist.