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• W2315303669 abstract "Context: Mini-tablets are compact dosage forms, typically 2–3 mm in diameter, which have potential advantages for paediatric drug delivery. Extended release (ER) oral dosage forms are intended to release drugs continuously at rates that are sufficiently controlled to provide periods of prolonged therapeutic action following each administration, and polymers such as hypromelllose (HPMC) are commonly used to produce ER hydrophilic matrices.Objective: To develop ER mini-tablets of different sizes for paediatric delivery and to study the effects of HPMC concentration, tablet diameter and drug solubility on release rate.Methods: The solubility of Hydrocortisone and theophylline was determined. Mini-tablets (2 and 3 mm) and tablets (4 and 7 mm) comprising theophylline or hydrocortisone and HPMC (METHOCEL™ K15M) at different concentrations (30, 40, 50 and 60%w/w) were formulated. The effect of tablet size, HPMC concentration and drug solubility on release rate and tensile strength was studied.Results and Discussion: Increasing the HPMC content and tablet diameter resulted in a significant decrease in drug release rate from ER mini-tablets. In addition, tablets and mini-tablets containing theophylline produced faster drug dissolution than those containing hydrocortisone, illustrating the influence of drug solubility on release from ER matrices. The results indicate that different drug release profiles and doses can be obtained by varying the polymer content and mini-tablet diameter, thus allowing dose flexibility to suit paediatric requirements.Conclusion: This work has demonstrated the feasibility of producing ER mini-tablets to sustain drug release rate, thus allowing dose flexibility for paediatric patients. Drug release rate may be tailored by altering the mini-tablet size or the level of HPMC, without compromising tablet strength." @default.
• W2315303669 created "2016-06-24" @default.
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• W2315303669 date "2012-04-27" @default.
• W2315303669 modified "2023-10-12" @default.
• W2315303669 title "The influence of HPMC concentration on release of theophylline or hydrocortisone from extended release mini-tablets" @default.
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• W2315303669 doi "https://doi.org/10.3109/03639045.2012.681053" @default.
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