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Research ArticleResearchMedication SafetyInfection Control

Three penicillin doses did not improve early-syphilis pregnancy outcomes versus one dose in a small trial

Sexually transmitted infections (PubMed)Jul 16, 2026

AI-summarized from the linked source. Educational brief, not medical advice.

Brief summary

In a single-center randomized trial of 23 pregnant patients with early syphilis, three weekly benzathine penicillin G doses did not improve maternal serologic response or neonatal outcomes compared with one standard dose.

What NurseJet pulled from the source

This nonblinded randomized trial enrolled 23 pregnant patients with secondary or early latent syphilis and compared one 2.4-million-unit benzathine penicillin G injection with three weekly injections. Maternal VDRL titers did not differ between groups at delivery or two months postpartum. All neonates were clinically healthy and achieved seroreversion by six months, with no detected group difference in neonatal outcomes. The findings align with current single-dose recommendations for early syphilis in pregnancy, but the very small, single-center sample cannot exclude uncommon or modest differences.

Why this matters for nurses

Obstetric nurses help coordinate timely treatment, allergy verification, injection administration, follow-up testing, partner-service referrals, and newborn evaluation. The trial addresses a common question about whether extra doses improve outcomes in early syphilis during pregnancy.

Bedside takeaway

A small randomized trial found no benefit from three benzathine penicillin doses over one for early syphilis in pregnancy.

How This Applies in Practice

Use this when: Caring for a pregnant patient receiving provider-ordered treatment for secondary or early latent syphilis.

On your shift

  • Verify the documented stage, allergy history, ordered benzathine penicillin product and dose, and planned serologic follow-up before administration.
  • Coordinate the maternal and newborn follow-up plan and promptly address missed treatment, testing, or referral steps through the care team.
Keep in mind: Do not alter the number of doses from this small trial alone. Follow the current obstetric and infection-control protocol, facility policy, and patient-specific provider orders.

Explain this for my unit

Key takeaways

  • The randomized, nonblinded trial enrolled 23 pregnant patients with secondary or early latent syphilis.
  • Maternal VDRL responses did not differ between one-dose and three-dose groups at delivery or two months postpartum.
  • All neonates were clinically healthy and achieved seroreversion by six months.
  • The small sample limits confidence about uncommon outcomes and smaller treatment differences.

Practice implications

  • Verify syphilis stage, allergy history, ordered benzathine penicillin product and dose, and the maternal and newborn follow-up plan. Do not add or omit doses based on this small trial; use the applicable obstetric and infection-control protocol and promptly address missed treatment or follow-up.

Limitations & cautions

  • The trial was nonblinded, involved only 23 participants at one center, and compared groups of 12 and 11 patients. All neonates had favorable observed outcomes, leaving little power to detect uncommon harms or differences. The results apply to secondary or early latent syphilis, not other stages.
  • AI-summarized from the linked source. Review the original article before applying to practice.

Citations

Exact source links

Public citations are filtered to exact credible source pages. Homepage-only or invalid links stay in admin review and are not shown here.

Sexually transmitted infections (PubMed)

Sexually transmitted infections (PubMed). Single versus three doses of benzathine penicillin G for early syphilis in pregnancy: no added benefit in serological response or neonatal outcomes.

Open original source

https://pubmed.ncbi.nlm.nih.gov/41314798/

Professional education only

This summary does not replace clinical judgment, facility policy, provider orders, or official guidelines. Verify practice changes against the original source and local protocol.

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