Using hydroxychloroquine to improve pregnancy outcomes in women with antiphospholipid syndrome

Evaluation of the Benefit of Adjuvant Treatment With Hydroxychloroquine to the Usual Medical Management for Obtaining an Uncomplicated Term Pregnancy in Primary Obstetric Antiphospholipid Syndrome

Phase 2 Interventional Assistance Publique - Hôpitaux de Paris · NCT04275778

This study is testing if adding hydroxychloroquine to standard treatment can help pregnant women with antiphospholipid syndrome have healthier pregnancies.

Quick facts

PhasePhase 2
Study typeInterventional
Enrollment110 (estimated)
Ages18 Years to 48 Years
SexFemale
SponsorAssistance Publique - Hôpitaux de Paris Academic / other
Locations1 site (Paris)
Trial IDNCT04275778 on ClinicalTrials.gov

What this trial studies

This clinical trial investigates the effectiveness of hydroxychloroquine combined with standard treatment (aspirin and low-molecular-weight heparin) in pregnant women diagnosed with antiphospholipid syndrome (APS). Patients will be randomly assigned to receive either the hydroxychloroquine treatment or a placebo, starting before the 14th week of gestation. Throughout the pregnancy, participants will be monitored monthly for clinical outcomes and biological markers. The goal is to assess whether hydroxychloroquine can reduce complications associated with APS during pregnancy.

Who should consider this trial

Good fit: Ideal candidates are women over 18 years old who are currently pregnant and have a history of complications related to antiphospholipid syndrome.

Not a fit: Patients with early isolated miscarriages, contraindications to hydroxychloroquine, or associated systemic lupus may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could significantly improve pregnancy outcomes for women with antiphospholipid syndrome.

How similar studies have performed: While there have been studies on APS treatments, the specific combination of hydroxychloroquine with standard care in this context is novel and has not been extensively tested.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age \>18 years
* Spontaneous consecutive pregnancy ongoing before the 14th week of gestation

  -- SAPL obstetrics (modified Sapporo criteria = Sydney criteria) with fetal death ≥10 weeks of gestation without further explanation; and / or preeclampsia (or HELLP syndrome) and / or prematurity \<34SA with placental insufficiency (with or without thrombotic SAPL)
* Signed informed consent

Exclusion Criteria:

* Other SAPL subgroups: early isolated miscarriages \<10 weeks
* Contraindication to hydroxychloroquine:

  * retinopathy,
  * hypersensitivity to chloroquine or hydroxychloroquine or to any of the other ingredients especially lactose
* Associated systemic lupus, associated Sjogren syndrome
* Treatment with hydroxychloroquine in progress
* Patient under guardianship or curatorship
* Patient deprived of liberty
* Lack of Social Insurance

Where this trial is running

Paris

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Antiphospholipid Syndrome in PregnancyAnticoagulantsAPSPregancyHeparin Low-Molecular-WeightAspirin
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.