Arthritis care & research | 2021
Clarifying Hydroxychloroquine Blood Levels Thresholds, Reply to Letter to the Editor.
Abstract
We thank Dr. Bitoun and colleagues for their interest and comments regarding our meta-analysis on hydroxychloroquine (HCQ) levels. Bitoun et al. raised an important question about the threshold of HCQ blood levels for clinical efficacy compared to the thresholds that predict the risk of retinal toxicity in lupus.