Increased Risk of Intrahepatic Cholestasis of Pregnancy in Women With Systemic Lupus Erythematosus Exposed to Azathioprine - Scorecard - MDSpire
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Elevated Risk of Intrahepatic Cholestasis of Pregnancy in Systemic Lupus Erythematosus Patients Treated with Azathioprine

  • By

  • Reem Farhat

  • Maria del Carmen Zamora-Medina

  • Sang-Cheol Bae

  • Megan R. W. Barber

  • Ann E. Clarke

  • Paul R. Fortin

  • Zahi Touma

  • Carl A. Laskin

  • Isabelle Malhamé

  • Giada Sebastiani

  • Christine Peschken

  • Manuel F. Ugarte-Gil

  • Alexandra Legge

  • Sasha Bernatsky

  • Évelyne Vinet

  • May 14, 2026

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Clinical Scorecard: Elevated Risk of Intrahepatic Cholestasis of Pregnancy in Systemic Lupus Erythematosus Patients Treated with Azathioprine

At a Glance

CategoryDetail
ConditionIntrahepatic Cholestasis of Pregnancy (ICP)
Key MechanismsAssociation with bile acid accumulation and thiopurine metabolism.
Target PopulationPregnant women with Systemic Lupus Erythematosus (SLE) treated with Azathioprine.
Care SettingMulticenter prospective cohort study.

Key Highlights

  • ICP incidence in the U.S. is 0.5% to 1.5%.
  • Bile acids >40 μmol/L significantly increase fetal risks.
  • Azathioprine (AZA) exposure linked to a three-fold increased risk of ICP in SLE.
  • Thiopurine metabolites measured to assess risk in AZA-exposed pregnancies.
  • Standardized data collection on demographics, comorbidities, and outcomes.

Guideline-Based Recommendations

Diagnosis

  • ICP diagnosed by pruritus and elevated bile acids (>10 μmol/L).

Management

  • Treatment with ursodeoxycholic acid (UDCA) and planned early delivery.

Monitoring & Follow-up

  • Regular assessment of bile acids and liver function tests in pregnant women with SLE on AZA.

Risks

  • Increased risks of spontaneous and iatrogenic preterm labor, meconium-stained amniotic fluid, and stillbirth.

Patient & Prescribing Data

Pregnant women with SLE requiring immunosuppressive therapy.

Monitoring thiopurine metabolites may help assess risk of ICP.

Clinical Best Practices

  • Conduct thorough risk assessments for ICP in SLE pregnancies treated with AZA.
  • Implement early delivery strategies for women diagnosed with ICP.

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