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Formulation studies on modified releasing amoxicillin trihydrate microcapsules
1Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Technology, Ankara-Turkey.
Abstract:
In vitro researches and in vivo animal experiments show that, generally the antibiotic concentration should be above minimum inhibitory concentration for optimal efficiency. There is also direct and indirect evidence from human trials to support this claim. Consequently, a modified-release dosage form of the beta-lactam antibiotics might be therapeutically more efficient than the existing conventional products, which are rapidly absorbed to produce transient peaks in serum drug levels. In our study, Amoxicillin was chosen as the model drug, because it is currently one of the most widely prescribed oral semisynthetic penicillins. By using various types of polymers and different formulations of them, we tried to improve a microparticular system. We succeeded in obtaining optimal production of particulars in the prepared microcapsule form with the solvent evaporation technique. By applying suitable pharmaceutical technological production parameters, the production of the dosage form which releases modified-release form of the model antibiotic is provided. Production processes and availability for the aim is controlled by using the pharmaceutical technological tests, mainly with the methods according to USP XXIV. Consequently compared to the classical Amoxicillin trihydrate dosage forms used in treatment, we managed to form the microcapsule structure containing modified release.
Insights
Modified-release Amoxicillin microcapsules offer improved therapeutic efficiency over conventional forms. This novel dosage form maintains antibiotic concentration above minimum inhibitory levels for better outcomes.
Area of Science:
- Pharmaceutical Technology
- Pharmacology
- Drug Delivery Systems
Background:
- Optimal antibiotic efficacy requires concentrations above the minimum inhibitory concentration (MIC).
- Conventional Amoxicillin dosage forms result in transient serum drug peaks, potentially reducing therapeutic effectiveness.
- Modified-release formulations may offer improved outcomes for beta-lactam antibiotics.
Purpose of the Study:
- To develop and characterize a modified-release Amoxicillin dosage form.
- To investigate the potential of microencapsulation for controlled drug release.
- To compare the novel formulation with conventional Amoxicillin trihydrate dosage forms.
Main Methods:
- Amoxicillin was microencapsulated using the solvent evaporation technique with various polymers.
- Pharmaceutical technological tests, including USP XXIV methods, were employed for quality control.
- The release characteristics of the microcapsules were evaluated.
Main Results:
- Optimal microparticle production was achieved using the solvent evaporation method.
- A microcapsule structure containing modified-release Amoxicillin was successfully developed.
- The developed formulation demonstrated controlled release properties.
Conclusions:
- Microencapsulation is a viable technique for creating modified-release Amoxicillin.
- The developed microcapsule formulation has the potential for enhanced therapeutic efficiency compared to conventional Amoxicillin.
- Further clinical studies are warranted to confirm the superiority of this modified-release dosage form.