Valaciclovir - Valtrex herpes drug important information

Valtrex (valaciclovir) is an antiviral drug. It slows the growth and spread of the herpes virus so that the body can fight off the infection. Valtrex will not cure herpes, but it can lessen the symptoms of the infection. Valtrex is used to treat infections caused by herpes viruses in adults and children. Illnesses caused by herpes viruses include genital herpes, cold sores, shingles, and chickenpox. Valtrex is also used to treat cold sores in children who are at least 12 years old, and to treat chickenpox in children who are at least 2 years old.

Important information about Valtrex

Before taking Valtrex, tell your doctor if you have HIV/AIDS, a weak immune system, kidney disease (or if you are on dialysis), or if you have had a kidney or bone marrow transplant.

- People with immune system problems:
People with problems with their immune systems should discuss their health with their doctor before taking Valtrex. Immune system problems could be HIV, certain cancer therapies, and organ transplants such as bone marrow or kidney transplants.

- People with kidney problems:
People with kidney problems are more likely to get side effects or even more kidney problems from taking Valtrex. Talk to your doctor about your kidney problems. You may need to take a lower dose to minimize the side effects.

Valtrex can be harmful to the kidneys, and these effects are increased when it is used together with other medicines that can harm the kidneys. Tell your doctor about all other medications you are using. You may need dose adjustments or special tests when taking certain medications together with Valtrex.

Treatment with Valtrex should be started as soon as possible after the first appearance of symptoms (such as tingling, burning, blisters). Herpes virus can be passed from an infected mother to her baby during childbirth. If you have genital herpes, it is very important to prevent herpes lesions during your pregnancy so that you do not have a genital lesion when your baby is born.

Valtrex will not prevent the spread of genital herpes. Herpes infections are contagious and you can infect other people even while you are taking with Valtrex. Stop taking Valtrex and call your doctor right away if you have any signs of a serious side effect that can harm red blood cells, such as: fever, easy bruising or bleeding, red spots on the skin (not related to herpes or chickenpox), bloody diarrhea, vomiting, pale or yellowed skin, weakness, fainting, or urinating less than usual or not at all.

There are several warnings for people who are considering taking Valrex. First, like with any medication, if you have an allergic reaction, get immediate medical help. An allergic reaction would be problems breathing, swelling of the throat, lips, tongue or face, and hives (rash). Anybody who is allergic to acyclovir (Zovirax) should avoid taking Valtrex.