Preparation technology of controlled-release type gastric floating tablet for preventing and treating ruminant endoparasite
An endoparasite and ruminant technology, which is applied in the field of preparation of slow-release gastric floating tablets for ruminant endoparasite prevention and control, can solve the problems of easy generation of drug resistance, low drug availability, long drug taking time, etc. The effect of bioavailability, stabilizing blood concentration, and reducing the frequency of medication
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Embodiment 1
[0039] (1) Preparation of composite carrier: Add dropwise 40-45°C deionized water to 15g food grade polyglutamic acid under stirring until completely dissolved, and add dropwise 5wt% dilute sulfuric acid to adjust the pH value of the solution to be stable at 3 within 10min. -4, add 10g poloxamer 188 and 5g polyethylene glycol 4000, add 40-45 ℃ deionized water under stirring to completely dissolve poloxamer and polyethylene glycol 4000, and heat up to reflux state to keep warm Stir for 3 hours, then cool down to 0-5°C at a cooling rate of 5°C / min and keep stirring for 30 minutes. The resulting mixture is sent to a freeze dryer, and the dried solid is made into a fine powder by an ultrafine pulverizer to obtain a composite carrier;
[0040] (2) Modification of the composite carrier: Add 2 g of food-grade sodium polyacrylate and 1 g of hydrogenated palm oil to the prepared 15 g of the composite carrier, mix well and use a microwave processor to treat with microwaves for 5 minutes,...
Embodiment 2
[0044] (1) Preparation of composite carrier: Add dropwise 40-45° C. deionized water to 10 g of food-grade polyglutamic acid under stirring until completely dissolved, and add dropwise 5 wt % dilute sulfuric acid to adjust the pH value of the solution to be stable at 3 within 10 min. -4, add 5g Poloxamer 407 and 3g Polyethylene Glycol 4000, add 40-45°C deionized water under stirring to completely dissolve Poloxamer and Polyethylene Glycol 4000, and heat up to reflux state to keep warm Stir for 3 hours, then cool down to 0-5°C at a cooling rate of 5°C / min and keep stirring for 30 minutes. The resulting mixture is sent to a freeze dryer, and the dried solid is made into a fine powder by an ultrafine pulverizer to obtain a composite carrier;
[0045] (2) Modification of the composite carrier: Add 3 g of food-grade sodium polyacrylate and 2 g of hydrogenated palm oil to the prepared 20 g of the composite carrier, mix well and use a microwave processor to treat with microwaves for 5 ...
Embodiment 3
[0049] (1) Preparation of composite carrier: Add dropwise 40-45° C. deionized water to 10 g of food-grade polyglutamic acid under stirring until completely dissolved, and add dropwise 5 wt % dilute sulfuric acid to adjust the pH value of the solution to be stable at 3 within 10 min. -4, add 5g Poloxamer 407 and 3g Polyethylene Glycol 4000, add 40-45°C deionized water under stirring to completely dissolve Poloxamer and Polyethylene Glycol 4000, and heat up to reflux state to keep warm Stir for 3 hours, then cool down to 0-5°C at a cooling rate of 5°C / min and keep stirring for 30 minutes. The resulting mixture is sent to a freeze dryer, and the dried solid is made into a fine powder by an ultrafine pulverizer to obtain a composite carrier;
[0050] (2) Modification of the composite carrier: Add 3 g of food-grade sodium polyacrylate and 2 g of hydrogenated palm oil to the prepared 20 g of the composite carrier, mix well and use a microwave processor to treat with microwaves for 5 ...
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