Lupus & antiphospholipid syndrome

Hydroxychloroquine in patients with systemic lupus erythematosus: how much is enough?

Lupus Sci MedPublished Observational cohort study

An erratum to this article was published (Lupus Sci Med, 20 Apr 2025 ↗)

Authors' conclusion

With the use of HCQ at stable doses of 200 mg/day (or 3.0-3.5 mg/kg/day) as the background therapy in patients with systemic lupus erythematosus, the majority of patients achieved prolonged remission.

Study context

Population
Inception patients with SLE treated with hydroxychloroquine (HCQ) with at least 5 years of follow-up, Lupus-Cruces cohort
Participants
150 inception patients
Exposure
Weight-adjusted HCQ dose in patients with vs without prolonged remission
  • Prolonged remissionn = 108
Outcome
Association between weight-adjusted HCQ dose during 5 years and prolonged remission
Follow-up
5 years
Methodological detailsinception cohort, routine clinical care data
  • Inception cohort
  • Routine clinical care data

Main finding

As reported in the abstract

Mean weight-adjusted HCQ dose per patient · 5-year follow-up

P = 0.5

Patients in prolonged remission
108 (72%)

Observational data: associations, not effects.

Further findings

HCQ dosing

Mean starting dose of HCQ (mg/day)
206
Mean weight-adjusted starting dose (mg/kg/day)
3.1
Patients treated with doses ≥5 mg/kg/day
0
HCQ maintained during whole 5-year follow-up
147 (98%)
Mean HCQ dose during 5-year follow-up (mg/day)
194.6
Mean weight-adjusted HCQ dose during 5-year follow-up (mg/kg/day)
2.9

Prednisone dose per patient · 5-year follow-up

Mean prednisone dose (mg/day)
2.3
Did not differ according to weight-adjusted HCQ dose

Weight-adjusted HCQ dose by immunosuppressives (IS) or mepacrine use · whole follow-up

Same in patients treated or not with IS or with mepacrine

Original publication

Hydroxychloroquine in patients with systemic lupus erythematosus: how much is enough? Lupus Sci Med. Published 26 February 2025. doi:10.1136/lupus-2024-001254

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