[Measurement of blood chloroquine concentrations during neuromyopathies and toxic retinopathies (author's transl)].

Blood chloroquine concentrations were measured in 5 patients having complications related to this treatment. No significant differences were noted when compared to controls. Further studies are required however before drawing any definite conclusions. The persistence of fairly high residual levels, several months after stopping treatment, is evidence of chloroquine retention in these patients.