In this manuscript a simple, rapid, and sensitive electrochemical method for the direct determination of thioridazine (TR) was developed. The electrochemical behavior of TR was studied at carbon ionic liquid electrode (CILE). The cyclic voltammetric results showed that CILE remarkably improved electrocatalytic activity towards the oxidation of TR in slightly acidic solutions. It led to a significant enhancement of the anodic peak current for TR with three anodic peaks at 0.59V, 0.78V and 0.93V, respectively and could effectively accumulate the drug at the electrode surface. The electrocatalytic performance was further exploited as a sensitive detection scheme for the determination of TR by differential-pulse voltammetry (DPV). Under optimized conditions, the calibration linear range and detection limit were 0.25 to 100 𝜇M and 50 nM, respectively. The proposed method was successfully used to quantification of TR in pharmaceutical samples. Also the analytical performance of this sensor has been evaluated for detection of TR in human serum samples. Manuscript profile