Valacyclovir Levels and Effects while Breastfeeding Summary of Use during Lactation The dosage of acyclovir in milk after valacyclovir is less than 1% of a typical infant dosage and would not be expected to cause any adverse effects in breastfed infants. But before deciding to take Valtrex while breastfeeding, be sure to check with your doctor. This study suggests that it would be safe for your baby, but you and your doctor still need to make this. Safe During Breastfeeding There are no side effects associated with taking acyclovir while breastfeeding. Women who apply a topical form of the drug to the skin on the breast should wash the area well before breastfeeding. A small amount of oral valacyclovir will pass to baby during breastfeeding, but the American Academy of Pediatrics supports use of the drug while breastfeeding as no side effects have been reported. Keyword Tags: Even though Valtrex is very safe to use, general precautions still need to be observed while using it. A woman taking Valtrex to treat the first outbreak of genital herpes shouldn’t stop taking the medication even after being tested positive to HIV. Yes, Valtrex may be taken by breastfeeding women. The manufacturer recommends that this medication be prescribed to breastfeeding women only when there is a clear need. Also, caution should be taken when using this medication while breastfeeding. Can I use acyclovir/valacyclovir while breastfeeding my baby? Yes. Acyclovir enters breast milk, but the amount of medication the baby receives is low. Acyclovir Levels and Effects while Breastfeeding Summary of Use during Lactation Even with the highest maternal dosages, the dosage of acyclovir in milk is only about 1% of a typical infant dosage and would not be expected to cause any adverse effects in breastfed infants. Can I take Valacyclovir while breastfeeding? The dosage of acyclovir in milk after valacyclovir is less than 1% of a typical infant dosage and would not be expected to cause any adverse effects in breastfed infants. While being generally safe, Valtrex has a different effect on different people. So, even if it’s safe for pregnant women, there are some other aspects you need to take into consideration. For instance, if you have any kidney issues or diseases, this medication might not be suitable for you.