Table 1.

Steady-state concentrations of clozapine at 400 mg day⁻¹ (n = 18)^*

Item	Range	Mean	SD
CLZ (ng ml−1)	202.2–1770.6	544.3	389.0
Normalized CLZ concentration†	7.22–57.86	19.74	12.82
Normalized NCLZ concentration†	3.48–23.63	9.18	5.65
Normalized sum concentration†	12.07–79.94	29.27	18.34
NCLZ/CLZ ratio	0.26–0.76	0.487	0.133

^*400 mg day⁻¹for at least 7 days.

^†ng ml⁻¹ mg⁻¹ day⁻¹ kg⁻¹body weight. CLZ, Clozapine; NCLZ, norclozapine.