Compare Valtrex vs. Famvir

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Treats viral infections.

Valtrex (Valacyclovir) is good for treating viral infections like herpes, chickenpox, and shingles. It won't cure the disease, but it'll shorten the length of a breakout.

No information currently available
  • Used as a first-choice treatment for herpes, chickenpox, and shingles infections and breakouts.
  • Most people (including pregnant women) usually take the oral medication without experiencing any side effects.
  • Available as a generic, so it's relatively cheap.
  • Most people generally don't develop a resistance to Valtrex (Valacyclovir).
  • Works well for most people to shorten the duration of outbreaks.
  • You don't have to take this as often as other antiviral medications.
No information currently available
  • Valtrex (Valacyclovir) is not a cure for herpes, chickenpox, or shingles. It will only shorten the time you have a breakout.
  • If you're taking Valtrex (Valacyclovir) for herpes, you should use barrier methods (condoms) when you're having sex since you can still pass it on to other people, even if you're taking the medication and you're not in a breakout.
No information currently available
Used for
  • Herpes zoster
  • Shingles Recurrent genital herpes simplex Recurrent genital herpes simplex
  • Suppression Recurrent herpes simplex labialis
Dosage forms
  • Pill
  • Pill
Want to save even more money?
Sign up now for a 30-day trial and save up to 95% at CVS, Kroger, Albertsons, and other pharmacies.
Not enough review data.Leave a review
Not enough review data.Leave a review
Side effects
3possible side effects
  • Headache
  • Dizziness
  • Abnormal ALT
See more detailed side effects
The Famvir (Famciclovir) FDA package insert doesn’t have numbers about how common side effects are.
Risks and risk factors
  • Kidney damage
  • Blood disorders
    • Weakened immune system
  • Confusion
    • Elderly
See more detailed risks and warnings
No information currently available