Intestine and stomach administration bioadhesive microsphere preparation and preparation method of intestine and stomach administration bioadhesive microsphere preparation
A bioadhesion and gastrointestinal technology, applied in the direction of pharmaceutical formulations, medical preparations of non-active ingredients, non-effective ingredients of polymer compounds, etc., can solve the problem of increased viscosity of raw and auxiliary materials and soft materials, and it is difficult to simultaneously take into account slow release, adhesion, Problems such as ball formation, to achieve high drug loading, enhance hydrophobic interaction and electrostatic interaction, and enhance bioadhesion performance
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example 1
[0027] Take 0.1g of lactose and 0.1g of pectin, add them to 10mL of absolute ethanol, stir at 300r / min for 20min, then add 0.4g of gastrointestinal absorption drug, add absolute ethanol to 100mL, and continue stirring for 1h to obtain the drug-loading solution. Add 0.2g of hydroxypropyl methylcellulose and 0.2g of hydrophobin to 100mL of absolute ethanol, stir at 300r / min for 20min, then add 0.4g of soybean lecithin, and continue to stir for 20min to obtain an adhesion solution. Add it into the adhesive solution, stir at 600r / min for 30min at 0°C to obtain a dispersion, take 32g of Span-80, add it to 1.6L of liquid paraffin, stir at 600r / min for 20min, and then at 0°C, Add the dispersion liquid dropwise at 1mL / min, heat to 20°C after the dropwise addition, and stir at 300r / min for 8h, filter to obtain the filter residue, wash the filter residue with petroleum ether for 3 times, place in a drying oven, and dry at 25°C for 25h. Gastrointestinal administration of bioadhesive micr...
example 2
[0029] Take 0.1g of lactose and 0.1g of pectin, add them to 15mL of absolute ethanol, stir at 350r / min for 25min, then add 0.7g of gastrointestinal absorption drug, add absolute ethanol to 150mL, and continue stirring for 1.5h to obtain the drug-loading solution. Take 0.3g of hydroxypropyl methylcellulose and 0.3g of hydrophobin, add them to 150mL of absolute ethanol, stir at 350r / min for 25min, then add 0.7g of soybean lecithin, and continue to stir for 25min to obtain an adhesive liquid, and the drug-loaded Add the liquid into the adhesive liquid, stir at 700r / min for 35min at 5°C to obtain a dispersion, take 49g of Span-80, add it to 2.5L of liquid paraffin, stir at 700r / min for 25min, and then at 5°C, Add the dispersion liquid dropwise at 1mL / min, heat to 25°C after the dropwise addition, and stir at 350r / min for 9h, filter the filter residue, wash the filter residue 4 times with petroleum ether, place in a drying oven, and dry at 30°C for 28h , to obtain bioadhesive micro...
example 3
[0031] Take 0.2g of lactose and 0.2g of pectin, add them to 20mL of absolute ethanol, stir at 400r / min for 30min, then add 1.0g of gastrointestinal absorption drug, add absolute ethanol to 200mL, and continue to stir for 2h to obtain the drug-loading solution. Add 0.5g of hydroxypropyl methylcellulose and 0.5g of hydrophobin into 200mL of absolute ethanol, stir at 400r / min for 30min, then add 1.0g of soybean lecithin, and continue to stir for 30min to obtain an adhesion solution. Add it into the adhesive solution, stir at 800r / min for 40min at 10°C to obtain a dispersion, take 64g of Span-80, add it to 3.2L of liquid paraffin, stir at 800r / min for 30min, and then at 10°C, Add the dispersion liquid dropwise at 2mL / min, heat to 30°C after the dropwise addition, and stir at 400r / min for 10h, filter to obtain the filter residue, wash the filter residue with petroleum ether for 3 to 5 times, place in a drying oven, and dry at 35°C After 30 hours, the bioadhesive microspheres for ga...
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