Brand name:
VALACYCLOVIR
Pronounced: VAL-trex
Generic name: Valacyclovir hydrochloride
Why is VALACYCLOVIR prescribed?

VALACYCLOVIR is used to treat certain herpes infections, including herpes zoster (the painful rash known as shingles), genital herpes, and herpes cold sores on the face and lips.
Most important fact about VALACYCLOVIR

VALACYCLOVIR should not be used by anyone with a weak immune system, such as those with HIV infection or those who have undergone a bone marrow or kidney transplant. VALACYCLOVIR can cause serious side effects, including death, in such people.
How should you use VALACYCLOVIR?

If you are taking VALACYCLOVIR for shingles, you should start using it as soon as possible after your doctor has made a diagnosis. It's best to see a doctor and start the drug within 48 hours of first noticing the rash. If you wait more than 72 hours after you first get a herpes zoster rash, VALACYCLOVIR may not be effective.

If you are using VALACYCLOVIR for genital herpes, begin taking it at the first sign of an attack. The medication may not be effective if you wait longer than 72 hours after the first attack or 24 hours after a later attack.

If you are taking VALACYCLOVIR for cold sores, you should start using it at the earliest signs of infection, such as tingling, itching, or burning. If you wait until the cold sore develops, VALACYCLOVIR might not work.

You may take VALACYCLOVIR with or without food.

If you miss a dose...

Take it as soon as you remember. If it is almost time for your next dose, skip the one you missed and go back to your regular schedule. Do not take 2 doses at the same time.

Storage instructions...

Store at room temperature.
VALACYCLOVIR side effects

Side effects cannot be anticipated. If any develop or change in intensity, inform your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue using VALACYCLOVIR.

* Side effects may include:
Abdominal pain, aggressive behavior, agitation, allergic reactions, coma, confusion, decreased consciousness, depression, diarrhea, dizziness, facial swelling, hallucinations, headache, hepatitis, high blood pressure, joint pain, mania, menstrual problems, nausea, rapid heartbeat, rash, visual abnormalities, vomiting

Why should VALACYCLOVIR not be prescribed?

Avoid VALACYCLOVIR if you are sensitive to it or the similar drug acyclovir (Zovirax).
Special warnings about VALACYCLOVIR

High doses of VALACYCLOVIR have proved dangerous in people whose immune system is compromised because of HIV infection, bone marrow transplant, or kidney transplant.

If your kidneys are not functioning properly, or you are taking drugs that may damage the kidneys such as Neomycin or Streptomycin, VALACYCLOVIR can make your condition worse or affect your central nervous system (brain and spinal cord).

Effects on the central nervous system are more common in older adults, leading to such symptoms as agitation, confusion, and hallucinations. Their kidneys are also more likely to be affected; and those with kidney problems need a smaller dose. In addition, older adults tend to suffer the pain of shingles for a longer time after healing has begun.

VALACYCLOVIR relieves the symptoms of genital herpes, but it is not a cure. There's also no evidence that it will prevent transmission of the disease. To avoid spreading the infection, don't have sexual intercourse during a flare-up.

VALACYCLOVIR is not intended for use in children.
Possible food and drug interactions when taking VALACYCLOVIR

If you are taking VALACYCLOVIR with certain other drugs, the effect of either drug could be increased, decreased, or altered. Check with your doctor before combining VALACYCLOVIR with cimetidine (Tagamet) and/or probenecid (Benemid).
Special information if you are pregnant or breastfeeding

The effects of VALACYCLOVIR without rx during pregnancy and breastfeeding have not been adequately studied. If you are pregnant or plan to become pregnant, notify your doctor immediately. If you are nursing and need to use VALACYCLOVIR, your doctor may advise you to discontinue breastfeeding while using VALACYCLOVIR.
Recommended dosage for VALACYCLOVIR

SHINGLES
Overdosage

When taken by people with kidney disorders, excessive doses of VALACYCLOVIR have been known to cause psychological problems and kidney failure. If you suspect an overdose, check with your doctor immediately.