In a cohort of chronically hyponatremic patients with serum sodium concentrations ≤105 mEq/L, post-therapeutic (post-Rx) neurological complications occurred after correction by >12 mEq/L in 24 hours and >18 mEq/L in 48 hours. In a cohort of chronically hyponatremic patients with serum sodium concentrations ≤105 mEq/L, post-therapeutic (post-Rx) neurological complications occurred after correction by >12 mEq/L in 24 hours and >18 mEq/L in 48 hours. Patients with chronic hyponatremia refers to patients without psychotic polydipsia who became hyponatremic at home. Solid circles represent patients with post-therapeutic neurologic complications, and open triangles represent patients who recovered uneventfully. The dashed lines represent therapeutic limits identified by the study (12 mEq/L in 24 hours and 18 mEq/L in 48 hours). Modified from ref. 18, with permission. Richard H. Sterns CJASN 2018;13:641-649 ©2018 by American Society of Nephrology