Famvir (Famcyclovir)


(Brand Option)

Prescription RequiredPrescription Required
FormulationFormulation: Tablet
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$79.00 ($7.90 per tablet)

$209.00 ($6.97 per tablet)

$235.00 ($7.83 per tablet)

$194.00 ($9.24 per tablet)


(Generic Alternative)

Prescription RequiredPrescription Required
FormulationFormulation: Tablet
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$87.00 ($2.90 per tablet)

$89.00 ($2.97 per tablet)

$205.00 ($2.28 per tablet)

$99.00 ($4.71 per tablet)

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Famciclovir treats shingles (herpes zoster), cold sores (herpes simplex), and genital herpes. 

Famciclovir is an antiviral drug. It can be used to suppress future outbreaks of genital herpes in individuals with frequent episodes.

Famciclovir manages, not cures, viral infections. The viruses remain in the body but famciclovir reduces the frequency and severity of outbreaks. It helps sores heal faster, reduces pain and itching, and shortens outbreaks.

In individuals with weakened immune systems, famciclovir can prevent the virus from spreading and causing serious complications.


  • Take Famvir as directed by your healthcare provider, typically 2-3 times daily, with or without food. 
  • Start taking Famvir at the first sign of an outbreak for better effectiveness. Delaying treatment may reduce its benefits. 
  • Take Famvir at evenly spaced intervals throughout the day for optimal effectiveness. 
  • Inform your healthcare provider immediately if your condition doesn't improve or worsens. 


  • Do not stop taking Famvir early, change your dose, or skip doses unless instructed by your healthcare provider. 

Your dose depends on your medical condition and response to treatment. 

Common side effects may include:

  • Headache
  • Nausea
  • Diarrhea
  • Mental/mood changes (such as agitation, slowed thinking, confusion, hallucinations)
  • Dizziness
  • Drowsiness
  • Signs of kidney problems (such as change in the amount of urine)
  • Yellowing of eyes/skin
  • Easy bruising/bleeding

Serious side effects that may require immediate medical attention include:

  • Confusion
  • Kidney problems (little or no urination, swelling in feet or ankles, feeling tired or short of breath)
  • Allergic reaction (hives, difficult breathing, swelling of face, lips, tongue, or throat)

This is not an exhaustive list, and other side effects may occur. If you experience any unusual or severe side effects while taking  Famvir,  contact your healthcare provider for medical advice.

Inform your healthcare provider about any allergies to famciclovir, penciclovir, or any other ingredients in the medication.

Share your medical history, especially kidney problems, with your healthcare provider before starting Famciclovir.

Famciclovir may cause dizziness and drowsiness. Avoid activities requiring alertness like driving or operating machinery until you know how the medication affects you. Limit alcohol and marijuana as they can worsen these side effects.

Consult your healthcare provider if you have lactose intolerance as Famvir may contain lactose.

Inform your healthcare provider about all medications you take, including Famciclovir, before undergoing surgery or dental procedures.

Discuss upcoming vaccinations with your healthcare provider as Famciclovir may interact with specific vaccines.

Older adults may experience increased side effects like dizziness, drowsiness, confusion, and kidney problems.

Famciclovir does not prevent herpes transmission. Use barrier methods (latex condoms/dental dams) consistently during sexual activity to minimize transmission risk.

Consult your healthcare provider before using Famciclovir if you are pregnant or breastfeeding due to potential risks and unknown effects on infants.

Brand Name:


Generic name:

Famcyclovir, Famciclovir, Famcyclovir

Other Names:

Famvir, Famvir, Famciclovir, Penvir

Strength(s): 125mg, 250mg, 500mg
Quantities Available: 10, 21, 30, 90


Important Information
The information above for Famvir (Famcyclovir) was provided to DoctorSolve.com by third parties. In no way should this information substitute for the advice of a physician. Consult a doctor or qualified health care professional if you have any medical concerns.
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