Uses
Zovirax is used to treat infection that is caused by the herpes viruses, like genital herpes, cold sores, shingles, and chicken pox. The drug is also used for other purposes, and in accordance with the doctor's instructions.

Dosage
Zovirax needs to be administered for the entire period prescribed by the doctor, for the symptoms and infection to be completely treated. Treatment with Zovirax should be started as soon as the first symptom appears. Herpes infections are contagious, hence you should avoid letting infected areas come into contact with other people. You should also avoid touching the infected area and then, your eyes.

Side effects
The side effects of Zovirax include hives, difficulty in breathing, facial swelling, less urination, easy bruising and weakness. The other reported side effects include nausea, diarrhea, loss of appetite, stomach ache and headache and swelling in hands or feet.

Drug precautions
It is essential to keep away from the drug if you are allergic to valacyclovir or Valtrex. The drug is is not expected to be harmful to an unborn, but it is advisable to inform your doctor if you are pregnant. The herpes virus can be passed on to the infant from an infected mother, during childbirth. It is important to prevent herpes lesions during pregnancy.

Drug interactions
Herpes infection is contagious, even while you are being treated with Zovirax. Before taking Zovirax, you need to indicate to the medical practitioner about a possible intake of Benemid. In case you are using probenecid or Benemid, you will need to undergo dosage adjustments or special tests during treatment. The other drugs that can affect the action of Zovirax include vitamins, minerals and herbal products.

Overdose
You should seek medical attention immediately, in the case of an overdose of Zovirax. An overdose of the drug will show up in the form of seizures and hallucinations and urinating less than usual or not at all. If you do notice any of these symptoms, you should inform the doctor.

Missed dose
In the case of a missed dose, you should move on to the next one - at the next schduled time and dosage. Do not take extra medicine to make up for the missed dose. Inform the doctor immediately and do not attempt any sort of self medication or corrective measures prior to consulting the doctor.

Storage
The drug should be stored at room temperature and in a cool, dry place. It should be kept out of the reach of children, especially the very experimental teenagers. Never share your medication with others.