Oral Valacyclovir (Valtrex)
for Cold Sores
Prescription antiviral taken at the first sign of an outbreak or daily as suppressive therapy to reduce recurrence frequency and transmission risk.
How it works
Valacyclovir is a prodrug of aciclovir, a nucleoside analogue that inhibits viral DNA polymerase, preventing herpes simplex virus replication.
What to watch for
Requires a prescription. Works best when started within 24–48 hours of symptom onset. Not a cure — does not eliminate the dormant virus.
Community experience
Anonymous · 0xaf67
3 weeks ago
Duration of use: Short term
Effectiveness: As expected
Side effects: None
“Took before onset and prevented a cold sore”
Other remedies for Cold Sores
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