Dissolution profiles of two commercial products (Motrine and Rufen®) were analyzed and compared at 8 pH levels, ranging from pH 2.0 to pH 8.0. It was demonstrated, as expected, that the rate and extent of ibuprofen dissolution dissolution was pH dependent. In vitro dissolution characteristics of the ibuprofen solid dispersion...
A two-part study was conducted with three poorly water soluble
drugs (phenylbutazone, tolbutamide, theophylline) to develop two new
drug delivery systems based on physical-chemical approaches.
In the first part, tolbutamide and phenylbutazone were made into
solid dispersions with various excipients using a lyophilization
technique. In vitro dissolution studies of these...