Acyclovir During Pregnancy: Zovirax and HSV Checks

Acyclovir in pregnancy: how to think about it

MotherToBaby says acyclovir and valacyclovir exposure is not expected to increase birth-defect risk. CDC says oral acyclovir can be administered to pregnant women with first-episode genital herpes or recurrent herpes, and IV acyclovir should be used for severe HSV disease. CDC also says suppressive acyclovir treatment starting at 36 weeks can reduce recurrences at term. ACOG and RCOG focus genital herpes care on reducing newborn transmission risk. UKTIS says available data do not suggest increased congenital malformation or preterm-delivery risk after aciclovir exposure. The practical answer is diagnosis, timing and delivery planning, not self-treatment.

Checking a different medicine? The Pregnancy Medication Safety Hub collects all 154 SafeMama medicine guides, including the active-ingredient and dose questions worth raising with a pharmacist.

Acyclovir: safer choices

• Contact your clinician promptly for a first herpes outbreak, genital lesions, severe cold sores, shingles symptoms, eye symptoms, fever or exposure concerns during pregnancy.
• Ask whether the plan is for a first episode, recurrent genital herpes, suppressive treatment near delivery, cold sores, shingles or another HSV-related reason.
• Use acyclovir only as prescribed and ask whether the product is topical, oral or IV because those are different clinical situations.
• Tell your clinician about kidney disease, immune suppression, dehydration, other antivirals and breastfeeding plans.

Acyclovir: what to avoid or double-check

• Avoid delaying care for a first genital herpes outbreak or sores near delivery.
• Avoid using leftover acyclovir tablets or someone else's antiviral medicine without diagnosis and pregnancy-specific instructions.
• Avoid assuming topical cold-sore cream, oral tablets and IV antiviral treatment answer the same risk question.
• Avoid stopping a prescribed suppression plan near delivery without asking the clinician managing HSV and birth planning.

How SafeMama helps

SafeMama can flag acyclovir, Zovirax, valacyclovir, Valtrex, famciclovir, cold-sore products, shingles terms, genital-herpes symptoms, 36-week suppression language and breastfeeding cautions so users can ask clearer clinician questions.

Open the SafeMama app, scan the barcode or search the ingredient, then use the result as a starting point for a conversation with your healthcare provider.

Sources

• MotherToBaby acyclovir and valacyclovir fact sheet
• CDC STI treatment guidelines for herpes
• ACOG management of genital herpes in pregnancy
• RCOG management of genital herpes in pregnancy
• UKTIS use of aciclovir in pregnancy