Acyclovir is known to pass through breast milk and thus should be avoided in a lactating mother. However if your wife is symptomatic and has developed lesion, she may be required to take acyclovir. An alternative could be Valtrex (valaciclovir) which is considered safe during breastfeeding. Herpes infections are contagious and can infect even while you are on treatment. It is important for you to avoid sexual contact during treatment of herpes. Also taking certain precautions like frequent washing f hands and touch of infected parts will help avoid transmission of the infection.
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.