Famvir

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Prescription Drug Information, Side Effects & Interactions for Famvir

Uses
This medication is an antiviral used in the treatment of shingles or in certain cases, genital herpes.

Notes

Do not share this medication with others.

Storage

Store this medication at room temperature between 59 and 86 degrees F (15 and 30 degrees C) away from heat and light.
Do not store in the bathroom.
Keep this and all medications out of the reach of children.

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How To Use

Take this medication by mouth exactly as prescribed.
This medication is most effective if taken as soon as herpes is noticed.
For best results, space the doses at equal intervals throughout the day (and night if directed by your doctor).
This will help ensure an even level of drug in the body at all times.
Do not increase your dose or take this more often than directed.
Your condition will not improve faster but the risk of side effects may be increased.

Side Effects

Headache, nausea, diarrhea and fatigue are most common the first few days as your body adjusts to the medication.
If any of these effects continue or become bothersome, inform your doctor.
Notify your doctor if you experience vomiting, skin rash, or, rarely, confusion and stiffness or if the condition for which this was prescribed appears to become worse.
If you notice other effects not listed above, contact your doctor or pharmacist.

Precautions

Tell your doctor if you have any pre-existing kidney disease or if you have any allergies.
Caution is advised in the elderly.
This medication should be used only if clearly needed during pregnancy.
Discuss the risks and benefits with your doctor.
This medication may appear in breast milk.
Consult your doctor before breast-feeding.

Missed Dose

Try to take each dose at the scheduled time.
If you miss a dose, take it as soon as remembered; do not take it if it is near the time for the next dose, instead, skip the missed dose and resume your usual dosing schedule.
Do not "double-up" the dose to catch up.

Drug Interactions

Tell your doctor of any over-the-counter or prescription medication you may take including probenecid or digoxin.
Do not start or stop any medicine without doctor or pharmacist approval.