Polyethylene glycol 400 as a stabilizing solvent in parenteral pentobarbital sodium solutions*

Pharmaceuticals and Related Drugs

“…The ultraviolet absorption spectra of eight antihistamines, such as Antazoline hydrochloride and Pyribenzamine hydrochloride, in water at different pH values and in alcohol have been listed (262). Other papers (49,58) reported the ion exchange and spectrophotometric assay of ten antihistamines. Mixtures of pyrrobutamine diphosphate and methapyrilene hydrochloride can be assayed spectrophotometrically (52).…”