ABSTRACT
BACKGROUND: Our previous study found that spray-dried glutinous rice starch (sGRS) is larger in size, rounder in shape and better in flowability than native GRS. It has the potential to be used for direct compression hydrophilic matrix (HM) tablets. OBJECTIVE: This study aimed to investigate the factors that affect the propranolol release from directly compressed sGRS HM tablets. METHODS: The effects of the amount of sGRS, the compaction pressure and the amount of magnesium stearate on the drug release rate from sGRS directly compressed HM were investigated. In vitro drug releases were performed. The dilution potential of sGRS was investigated. RESULTS: The higher the sGRS content, the slower the release rate of propranolol. The compaction pressure and the amount of magnesium stearate did not significantly affect the release rate of the drug. The sGRS showed plastic deformation under compaction with a dilution potential of 46%. CONCLUSIONS: sGRS can be used as a direct compression HM. The amount of sGRS significantly affected the release rate of the drug from the matrix.
Subject(s)
Drug Compounding/methods , Oryza/chemistry , Spray Drying , Starch/chemistry , Tablets , Acetaminophen/administration & dosage , Acetaminophen/chemistry , Acetaminophen/pharmacokinetics , Chemical Phenomena , Compressive Strength/physiology , Drug Carriers/chemical synthesis , Drug Carriers/chemistry , Drug Liberation , Glutens/chemistry , Humans , Hydrophobic and Hydrophilic Interactions , Materials Testing , Osmolar Concentration , Particle Size , Pressure , Solubility , Tablets/chemical synthesis , Tablets/chemistry , Tablets/pharmacokineticsABSTRACT
Dental caries prevention products available on the market contain only remineralizing agents or antibacterial agents. This study aimed to develop adhesive pastes containing calcium phosphate and α-mangostin for dental caries prevention using the optimization technique. Calcium phosphate was used as a remineralizing agent, and extracted α-mangostin was used as an antibacterial agent. The effect of the independent variables, which were fumed silica, Eudragit® EPO, polyethylene glycol, and ethyl alcohol, on the responses was investigated. The drying time, erosion rate, calcium release rate, and α-mangostin release rate were established as the measured responses. An equation and a model of the relationship were constructed. An optimal formulation was obtained, and its effect on dental caries prevention was investigated using the pH-cycling model. The quadratic equation revealed that the drying time, calcium release rate, and α-mangostin release rate tended to decrease when increasing the fumed silica and decreasing other factors. The erosion rate tended to increase when decreasing Eudragit® EPO and increasing other factors. The observed responses of the optimal adhesive pastes were not significantly different from the predicted responses. This result demonstrated that optimization is an efficient technique in the formulation development of the adhesive pastes. In addition, the optimal adhesive pastes could enhance acid resistance activity to the tooth enamel.
