Add time:07/22/2019         Source:sciencedirect.com

Thioridazine hydrochloride is a drug used in treatment of mental illness that shows side effects. Therefore, it is interesting to study the change of the physico-chemical properties of the drug in different environments to understand the mechanism of action of the drug. Thioridazine can be considered as a hydrotrope if we considered that the term comprise hydrophilic and hydrophobic moieties that form aggregates by a stacking mechanism as it is the case of all the phenothiazine tranquillizing drugs. The association properties of the amphiphilic phenothiazine drug thioridazine hydrochloride were investigated by density, ultrasound, isothermal titration calorimetry and dynamic light scattering (DLS), yielding values of the critical concentration, adiabatic apparent compressibilities and hydrodynamic radius. The DLS data were analyzed according to the treatment of the Derjaguin, Landau, Verwey and Overbeek (DLVO) theory to study the stability of the system. The aim of the study is to obtain information about the physico-chemical characterization of the drug in aqueous solution and the effect of ethanol on the aggregate stability of this amphiphilic drug. The phenothiazine tranquillizing drugs have interesting association characteristics that derive from their rigid, tricyclic hydrophobic groups.

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