What is the most important information I should know about valtrex?

Take all of the valtrex that has been prescribed for you even if you begin to feel better. Your symptoms may start to improve before the infection is completely treated.

Treatment with valtrex should be started as soon as possible after the first appearance of symptoms (e.g. tingling, burning, blisters).

Herpes infections are contagious and you can infect other people, even during treatment. Avoid letting infected areas come into contact with other people. Wash your hands frequently to prevent transmission.

Valtrex is not a cure for herpes virus infections.

What is valtrex?

Valtrex is an antiviral drug. It slows the growth and spread of the herpes virus so that the body can fight off the infection. Valtrex lessens the symptoms of these infections and shortens the length of time you are sick.

Valtrex is used in the treatment and suppression of genital herpes, shingles, and cold sores. Valtrex is not a cure for herpes virus infections.

Valtrex may also be used for purposes other than those listed in this medication guide.

What should I discuss with my healthcare provider before taking valtrex?

Do not take valtrex without first talking to your doctor if you are allergic to acyclovir (Zovirax). Before taking this medication, tell your doctor if you have kidney disease or immune system problems. You may need a dosage adjustment or special monitoring during treatment with valtrex. Valtrex is in the FDA pregnancy category B. This means that it is not expected to be harmful to an unborn baby. Do not take this medication without first talking to your doctor if you are pregnant or could become pregnant during treatment. It is not known whether valtrex passes into breast milk and how it may affect a nursing baby. Do not take this medication without first talking to your doctor if you are breast-feeding a baby.

How should I take valtrex?

Take valtrex exactly as directed by your doctor. If you do not understand these directions, ask your pharmacist, nurse, or doctor to explain them to you.

Treatment with valtrex should be started as soon as possible after the first appearance of symptoms (e.g. for cold sores-tingling, burning, blisters).

Take each dose with a full glass of water.

Valtrex can be taken with or without food. Taking valtrex with food may decrease stomach upset.

Take all of the valtrex that has been prescribed for you even if you begin to feel better. Your symptoms may start to improve before the infection is completely treated.

It is important to take valtrex regularly to get the most benefit.

Lesions caused by herpes viruses should be kept as clean and dry as possible. Wearing loose clothing may help to prevent irritation of the lesions.

Store valtrex at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. However, if it is almost time for the next regularly scheduled dose, skip the missed dose and take the next one as directed. Do not take a double dose of this medication unless otherwise directed by your doctor.

What happens if I overdose?

Seek emergency medical treatment if an overdose is suspected.

The symptoms of an overdose of valtrex are not well known, but an overdose of acyclovir (Zovirax), which is a similar drug, may cause seizures, hallucinations, and kidney damage (decreased urine production).

What should I avoid while taking valtrex?

Herpes infections are contagious and you can infect other people, even during treatment. Avoid letting infected areas come into contact with other people. Wash your hands frequently to prevent transmission.

Valtrex will not prevent the spread of genital herpes. Avoidance of sexual intercourse and use of latex condoms may prevent spreading the virus to others.

What are the possible side effects of valtrex?

Stop taking valtrex and seek emergency medical attention if you experience an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives).

Other, less serious side effects may be more likely to occur. Continue to take valtrex and talk to your doctor if you experience

• nausea, vomiting, diarrhea, constipation, or abdominal pain;
• headache;
• dizziness; or
• tremors.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.

What other drugs will affect valtrex?

Probenecid (Benemid) and cimetidine (Tagamet, Tagamet HB) may increase the effects of valtrex and possibly lead to dangerous side effects. You may need a dosage adjustment or special monitoring during treatment if you are taking probenecid or cimetidine.

Drugs other than those listed here may also interact with valtrex. Talk to your doctor and pharmacist before taking any prescription or over-the-counter medicines, including vitamins, minerals, and herbal products.