According to Drugs.com, Valtrex is an antiviral drug used in the treatment of infections resulting from herpes viruses in children and adults. This drug is used to treat cold sores in children at least 12 years old and in the treatment of chickenpox in children at least 2 years old.
According to Drugs.com, Valtrex does not cure herpes, but it restrains the virus, allowing the body time to fight the infection. Herpes viruses cause various illnesses, including cold sores, shingles, genital herpes and chickenpox. Valtrex is not effective in preventing the transmission of genital herpes. This drug should not be given to children unless it is prescribed for them. Valtrex is not expected to cause harm to an unborn baby when taking during pregnancy.