Delayed release particles of acetaminophen were prepared by supercritical CO2. The particles'release and capsule's release were also studied. This is a new method to prepare delayed release particles by supercritical fluid.
UV detection was used to determine the content of acetaminophen. The factors' effects on drug release were studied:excipient, ratio, supercritical CO2 temperature, supercritical CO2 pressure and the time. The optimal condition was:with X1 as excipient, the ratio of excipient and drug...