Hydroxychloroquine Serum Concentrations and Flares of Systemic Lupus Erythematosus: A Longitudinal Cohort Analysis

Abstract

Noncompliance and subtherapeutic serum HCQ levels were seen frequently in these SLE patients, which was partly due to the low prescribed dose. In patients in remission, higher HCQ concentrations were associated with a trend showing fewer flares over time.