Valacyclovir is an antiviral agent used in the treatment of shingles (herpes zoster) or genital herpes.
This medication may also be used for cold sores (herpes simplex).
Take this medication by mouth as directed. Take all this medication as prescribed. Do not skip doses or stop taking this without your doctor's approval. Stopping therapy too soon may result in ineffective treatment. For best results, take this medication at evenly spaced intervals throughout the day and night.
Nausea, vomiting, headache, loss of appetite, weakness, stomach pain, or dizziness may occur the first several days as your body adjusts to the medication. If any of these effects continue or become bothersome, inform your doctor. Notify your doctor if your condition does not appear to improve or you experience a worsening of symptoms while taking this medication. Use caution operating machinery or participating in activities requiring alertness if this medication makes you feel dizzy. If you notice other effects not listed above, contact your doctor or pharmacist.
Tell your doctor if you have: kidney disease, blood disorders, any allergies. Caution is advised when using this drug in the elderly because they may be more sensitive to the effects of the drug. This medication should be used only if clearly needed during pregnancy. Discuss the risks and benefits with your doctor. It is not known if this medication appears in breast milk. Consult with your doctor before breast-feeding.
Tell your doctor of any over-the-counter or prescription medication you may take including: cimetidine, probenecid. Do not start or stop any medicine without doctor or pharmacist approval.
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.
Store this medication at room temperature between 59 and 77 degrees F (15 to 25 degrees C) away from heat and light. Do not store in the bathroom. Keep this and all medications out of the reach of children.