Gasco M R, Trotta M, Carlotti M E
J Pharm Sci. 1982 Feb;71(2):239-41. doi: 10.1002/jps.2600710224.
The effect of carboxylic acids on the permeation of chlorpromazine was investigated through a dimethyl polysiloxane nonpolar membrane. The permeability of the diffusate, at pH 5.8, increases considerably in the presence of carboxylic acids or phosphate, probably due to an ion-pair formation between the relative anions and chlorpromazine.