Abstract

For the measurement of the tetracyclic antidepressant maprotiline in human serum, a gas chromatographic method with flame-ionization detection has been developed. The assay specifications obtained are as follows: a precision (C.V.) of 3.5–6.4%, and a relative recovery of 97–109% using amitriptyline as internal standard. The sensitivity of the assay from serum was 40 nmol/l. The applicability of the method has been shown by measuring steady-state serum levels of five inpatients. The steady-state serum levels of maprotiline given at a daily dosage of 75 mg varied from 272 to 570 nmol/l.

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