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OBJECTIVE:To prepare diclofenac sodium controlled release pellets and investigate the mechanism of re?lease.METHODS:Single-factor method was used to investigate the influence of the composition of solvent system in coating solution,the concentration of coating material,porogenic agent and plastifier on the release rate of drug.RESULTS:When the concentration of coating material and the proportion of water increased,the release rate of pellets was increased;the release rate was further increased with PVP K30 added.CONCLUSION:The pellets belongs to the matrix-coating pellets,and the release mechanism varies with the change of coating thickness.
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OBJECTIVE:To prepare red sage gel for implantation and to establish a method for its quality control.METHODS:With carbamer934as vehicle,2%red sage gel was prepared;a HPLC method for the determination of tanshinone in gel was established.RESULTS:The calibration curve of tanshinoneⅡ A was linear in the concentration range of16.59～33.18ng/ml,Y=9723X—2569(n=5),r=0.9987.CONCLUSION:The preparation of red sage gel was simple,its quality was stable;the method of quality control was rapid and accurate.
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OBJECTIVE: To study the antibacterial actions of Qinghou buccal tablets in vivo and in vitro. METHODS: Minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of Qinghou buccal tablets were determined by standard test tube doubling dilution method;And the antibacterial action of which on staphylococcus aureus in mice in vivo were monitored. RESULTS: Qinghou buccal tablets had significant in vitro antibacterial action on staphylococcus aureus, ?-hemolytic streptococcus, ?-hemolytic streptococcus, streptococcus pneumoniae and hemophilus influenza, with MIC and MBC at 0.0 625～0.50g/ml and 0.125～1.0g/ml, respectively,and which had bacteriostatic action on mice that injected i.p. with staphylococcus aureus. CONCLUSION: Qinghou buccal tablets were proved to be of bacteriostatic actions in vitro and in vivo.