title: [Current problems in the quality control of pharmaceutical preparations manufactured in pharmacies III. Investigation of theophilline containing suppositories].
abstract: In the present part of our series of papers a study on theophilline containing suppositories prepared in pharmacies is described. From the possible methods for assay of theophilline two nonaqueous titrations are compared. In first, theophilline is measured as a very weak base in a mixture of glacial acetic acid and acetic anhydride with perchloric acid using Sudan-III indicator, in second, the compound is measured as medium strong acid in dimethylformamide solvent with sodium-hydroxide titrant using phenolphtalein indicator. These methods were validated and the first was found more appropriate for regulatory control. We investigated suppositories prepared in our laboratory and in different pharmacies. The study revealed the poor quality of the preparations due to the difficulties in the technology and the importance of the applied vehicle. A guideline for the good preparation practice and an alternative technology are proposed.
authors.affiliation: Semmelweis Egyetem, Gyógyszerészi Kémiai Intézet, Budapest, Hogyes E u 9 -- 1092.
authors.forename: Novák Krisztina
authors.initials: NK
authors.lastname: Takácsné
authors.forename: Bálint
authors.initials: B
authors.lastname: Sinkó
authors.forename: Ildikó
authors.initials: I
authors.lastname: Hang
authors.forename: Gézáné
authors.initials: G
authors.lastname: Kiss
authors.forename: Adám Zoltán
authors.initials: AZ
authors.lastname: Dávid
authors.forename: Péter Es
authors.initials: PE
authors.lastname: Horváth
mesh_terms: D006814:Hungary; D004364:Pharmaceutical Preparations / Q000592:standards*; D010594:Pharmacies / Q000592:standards*; D011786:Quality Control; D013488:Suppositories / Q000592:standards*; D013806:Theophylline / Q000032:analysis / Q000592:standards*
chemical_list: D004364:Pharmaceutical Preparations; D013488:Suppositories; D013806:Theophylline