DISSOLUTION DIFFERENCE BETWEEN ACIDIC AND NEUTRAL MEDIA OF ACETAMINOPHEN TABLETS CONTAINING A SUPER DISINTEGRANT AND A SOLUBLE EXCIPIENT - II

The disintegration and dissolution of acetaminophen tablets containing sucrose and Ac-Di-Sol/Primojel was significantly different between ac idic and neutral media, The purpose of this study,vas to investigate t he mechanism of this phenomenon and to propose a way of reducing the d issolution difference between the two media, Tablets of different comb inations of active ingredient, sucrose, and Ac-Di-Sol/Primojel were pr epared and their dissolution in various media,Fas evaluated, The disso lution differences were found to be largely related to the hydrophobic ity of the active ingredient and pH difference of the two media, This difference was even more evident under the condition where acetaminoph en, sucrose, and Primojel were combined, The dissolution difference wa s therefore attributed to the depressed function of Primojel in the ac idic medium, the stronger binding of sucrose, the hydrophobicity of th e active ingredient and pH difference of the two media, Increasing the concentration of Primojel or incorporating the surfactant in the tabl et can thus greatly decrease the dissolution difference between acidic and neutral media.