Is acyclovir considered safe during pregnancy?
Acyclovir is an antiviral medicine used to treat infections like herpes (including genital herpes) and shingles. In general, acyclovir is commonly prescribed during pregnancy when it’s needed to control a herpes infection, because untreated infection can pose risks to the pregnancy.
When do doctors use acyclovir in pregnancy?
Acyclovir may be used at different points in pregnancy if you have a herpes outbreak or are at risk of outbreaks, including:
- Treatment of an active herpes flare
- Suppressive therapy later in pregnancy to reduce the chance of an outbreak at delivery
Does acyclovir cause birth defects or problems for the baby?
Large amounts of real-world use have not shown a clear pattern of major birth-defect risk from acyclovir. Clinicians still weigh benefits versus any potential risks for each person, but acyclovir is among the antivirals typically used when herpes treatment is required in pregnancy.
Can you take acyclovir in any trimester?
Acyclovir can be used in pregnancy when clinically indicated, including in later pregnancy. If you’re pregnant and considering it, the key step is to follow your clinician’s guidance on dose and timing based on why you’re taking it (outbreak vs prevention).
What should you discuss with your OB/GYN or midwife first?
Before starting or changing acyclovir, tell your clinician if you:
- Are taking other medications
- Have kidney problems (dose adjustments may be needed for some people)
- Have the first-ever episode of genital herpes (management around delivery can be different)
- Are near your due date (so they can plan to reduce risk at delivery)
What if you can’t take it?
If acyclovir isn’t appropriate for you for any reason, your clinician may consider alternatives based on the type of infection and your stage of pregnancy.
If you share how far along you are and whether you’re taking acyclovir for an active outbreak or to prevent outbreaks, I can tailor the answer more closely to your situation.