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• W3088766885 abstract "Abstract This work describes the formulation and evaluation of a chitosan microneedle patch for the transdermal delivery of meloxicam to manage pain in cattle. Microneedle patches composed of chitosan and chitosan/meloxicam were evaluated regarding their chemical composition, uniformity of physical characteristics, capacity to penetrate the skin, and response to thermal and thermo-mechanical changes. Microneedle patches were prepared by varying the percentage of acetic acid used during solution preparation, including 90% (v/v), 50% (v/v), and 10% (v/v). In addition, drug release was assessed by modeling different percentages of penetration into the skin and the number of microneedles on the microneedle patch. Scanning electron microscopy confirmed the presence of microneedles uniformly organized on the patch surface for each percentage of acetic acid used. Fourier transform infrared spectroscopy revealed that 10% (v/v) of acetic acid in the solution was a suitable condition to preserve the characteristic bands of chitosan (amide I and amide II) and meloxicam (amine N H stretch and C O stretch) as compared to 90% (v/v) and 50% (v/v) of acetic acid used during the solution preparation. The resultant microneedle patches were successful in penetrating the skin in a cow's cadaver ear. Results demonstrated that the average depth penetration measured after complete dehydration of the penetrated skin was approximately 78 ± 1 μm. Chitosan and chitosan/meloxicam microneedle patches with higher acetic acid percentages reflected greater resistance to compressive force as temperature increased. Time-dependent simulation of the transport of diluted species by COMSOL revealed that the transdermal drug delivery increases in function to the increment of the number of microneedles on the surface patch and percentage of penetration per microneedle. One patch released a drug concentration of 3.57 × 10−5 mol/m3 in the skin per week, which represents the 26.2% of what is needed for pain management in cattle, established as 1.43 × 10−4 mol/m3. These results demonstrate that chitosan/meloxicam microneedles patches may be suitable to manage pain in cattle after routine procedures." @default.
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• W3088766885 date "2021-01-01" @default.
• W3088766885 modified "2023-10-01" @default.
• W3088766885 title "Design, characterization, and modeling of a chitosan microneedle patch for transdermal delivery of meloxicam as a pain management strategy for use in cattle" @default.
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• W3088766885 doi "https://doi.org/10.1016/j.msec.2020.111544" @default.
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