The manufacturer of Acyclovir does not recommend using the drug during pregnancy, but informal statistics have been kept and data suggest that there has not been an increase in birth defects to babies born to moms who were taking it.
However, antiviral drugs for treating herpes viruses, including acyclovir or valacyclovir, should not be administered within 24 hours of Varivax, because these drugs can reduce the effectiveness of the vaccine.
However, if the case is particularly severe, the doctor may prescribe an antiviral medication such as acyclovir which, if given at the beginning of the outbreak, may help clear things up faster.
The frequency and duration of HSV lesions can be reduced with antiviral therapy, including acyclovir (Zovirax), famciclovir (Famvir), and valacyclovir (Valtrex).
Antiviral pills such as acyclovir (Zovirax), famciclovir, (Famvir), and valacyclovir (Valtrex) can cancel an outbreak and help prevent recurrent outbreaks.