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Acyclovir Or Valacyclovir

Acyclovir Or Valacyclovir


Valacyclovir is used to treat herpes virus infections, including herpes labialis (also known as cold sores), herpes zoster (also known as shingles), and herpes simplex (also known as genital herpes) in adults. It is also used to treat chickenpox and cold sores in children.

In your body, valacyclovir becomes the anti-herpes medicine, acyclovir. Although valacyclovir will not cure shingles or genital herpes, it does help relieve the pain and discomfort and helps the sores heal faster.


Valacyclovir is used to treat infections caused by certain types of viruses. In children, it is used to treat cold sores around the mouth (caused by herpes simplex) and chickenpox (caused by varicella zoster). In adults, it is used to treat shingles (caused by herpes zoster) and cold sores around the mouth.

Valacyclovir is also used to treat outbreaks of genital herpes. In people with frequent outbreaks, this medication is used to reduce the number of future episodes.

Valtrex Dosage

For an initial genital herpes outbreak, the typical dose is 1 gram (1,000 mg), taken twice a day, for 10 days. For subsequent genital herpes outbreaks, the dosage is usually 500 mg, taken twice a day, for three days. For an initial outbreak of cold sores, 2 g (2,000 mg) is taken every 12 hours for one day, and for shingles, the dose is typically 1 g, taken three times a day for seven days.

Pregnancy and Valtrex

Valtrex is not expected to harm an unborn child but discuss a pregnancy with your doctor.

Herpes can be passed from an infected mother to a baby if the mother has a genital lesion during childbirth.

Valtrex will pass into breast milk and could harm a nursing infant.

Do not take this drug without talking to your doctor if you plan to breastfeed.

Side Effects of Valtrex

  • Nausea
  • Stomach pain
  • Dizziness
  • Headache
  • Diarrhea
  • Vomiting

Valtrex Interactions

Since Valtrex is a type of antiviral medication, it can inactivate a varicella or zoster vaccine before your body can develop immunity to the virus, essentially voiding the benefits of the immunization.

Your doctor may delay giving these vaccines until Valtrex is out of your system.

Drugs that cause kidney problems, like a non-steroidal anti-inflammatory drug (NSAID) like ibuprofen or naproxen, can interact with Valtrex.

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