Levetiracetam oral solution and preparation method thereof
A technology for oral solution and solvent, applied in the field of medicine, can solve the problems of bad taste of levetiracetam oral solution, improper temperature control of production process, growth of related substances of raw materials, etc., and achieves suitable bacteriostatic agent content and easy production. The effect of stable operation and product quality
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[0037] The present invention also provides a kind of preparation method of levetiracetam oral solution as above, comprises the steps:
[0038] (1) Add part of the solvent to the liquid mixing tank, dissolve the buffer in the solvent, heat to 70-80°C, add the preservative and stir to dissolve it fully, then add the sweetener, stir evenly and cool at 70-80°C Keep warm for 5-10 minutes to get the liquid medicine;
[0039] (2) Cool down the medicinal solution obtained in step (1) to 30-40°C, add levetiracetam, stir to dissolve it completely, cool to room temperature, add fragrance, stir and mix evenly, and dilute to volume with solvent After the full amount, stir evenly, and filter with a polyethersulfone filter element to obtain levetiracetam oral solution.
[0040] The beneficial effect of the preparation method of levetiracetam oral solution of the present invention is:
[0041] In the preparation process of levetiracetam oral solution of the present invention, there is a pro...
Embodiment 1-4
[0044] Embodiment 1-4 provides a kind of levetiracetam oral solution respectively, and the formula of 150ml levetiracetam oral solution is as follows:
[0045] Levetiracetam oral solution formulation in table 1 embodiment 1-4
[0046]
[0047] The preparation method step of the levetiracetam oral solution in embodiment 1-4 is as follows:
[0048] (1) Add 40% of the purified water in the formula into the liquid mixing tank, add citric acid and sodium citrate and stir until completely dissolved, then add glycerin, stir to make it evenly mixed;
[0049] (2) Heat the liquid medicine to 80°C, add methylparaben and propylparaben, stir to dissolve it fully, add monoammonium glycyrrhizinate S, maltitol liquid, and acesulfame potassium in turn, stir and dissolve at 75°C , keep warm for 8 minutes;
[0050] (3) Cool down the liquid medicine to 40°C, add levetiracetam, stir to dissolve it completely, cool to room temperature, add grape essence, stir and mix evenly, dilute to full vol...
Embodiment 5
[0053] Embodiment 5 provides a kind of levetiracetam oral solution, the formula of 150ml levetiracetam oral solution is as follows:
[0054] Levetiracetam oral solution formulation in table 2 embodiment 5
[0055]
[0056]
[0057] The preparation method step of the levetiracetam oral solution in embodiment 5 is as follows:
[0058] (1) Add purified water with 40% formula in the liquid mixing tank, add acetic acid and sodium acetate to adjust the pH value to 5.0, stir until completely dissolved, add glycerin, stir to make it evenly mixed;
[0059] (2) Heat the medicinal solution to 70°C, add sodium benzoate, stir to make it fully dissolve, add monoammonium glycyrrhizinate S, maltitol liquid, and acesulfame potassium in sequence, and stir at 70°C for 10 minutes;
[0060] (3) Cool the liquid medicine below 30°C, add levetiracetam, stir to dissolve it completely, cool to room temperature, add orange essence, stir and mix evenly, dilute to full volume with the remaining pur...
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