CN112206209B - Acetylcysteine granules and preparation method thereof - Google Patents

Acetylcysteine granules and preparation method thereof Download PDF

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CN112206209B
CN112206209B CN202010924964.0A CN202010924964A CN112206209B CN 112206209 B CN112206209 B CN 112206209B CN 202010924964 A CN202010924964 A CN 202010924964A CN 112206209 B CN112206209 B CN 112206209B
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acetylcysteine
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menthol
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贾飞
戴娟
邹永华
陈晓萍
黎瑶
郦丹婷
李青青
沈锡明
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Hangzhou Bio Sincerity Pharma Tech Co ltd
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Abstract

The invention relates to acetylcysteine granules and a preparation method thereof, wherein the acetylcysteine granules comprise raw materials of acetylcysteine and auxiliary materials, and the auxiliary materials comprise a filling agent, menthol, a flavoring agent and essence, wherein the weight percentage of the menthol is 0.8-1.5%. The acetylcysteine granules provided by the invention use menthol and adopt a fluidized bed one-step granulation process, so that the prepared acetylcysteine granules have better stability and higher bioavailability.

Description

Acetylcysteine granules and preparation method thereof
Technical Field
The invention belongs to the field of pharmaceutical preparations, and particularly relates to acetylcysteine granules and a preparation method thereof.
Background
N-Acetylcysteine (NAC) is formed by adding acetyl to L-cysteine, is a precursor of reduced Glutathione (GSH), is white crystalline powder in appearance, and has odor and taste similar to garlic. It can directly scavenge free radicals in vivo, enhance the body's ability to resist oxidative stress, and reduce the production of inflammatory cytokines, chemokines and adhesion molecules. In addition, acetylcysteine also regulates the immune status of the body and the apoptotic program.
Acetylcysteine is a mucus dissolving agent, and a-SH group in the chemical structure of acetylcysteine can break a disulfide bond (-S-S-) in a mucin polypeptide chain in sputum, reduce the viscosity of the sputum, liquefy the sputum and facilitate expectoration. But at the same time, because the acetylcysteine has active-SH group, the group is easy to be oxidized and is sensitive to damp heat, so that the stability of the raw material medicine is poor, the storage process is extremely unstable, and the curative effect of the acetylcysteine is seriously reduced.
The earliest formulation of acetylcysteine on the market is inhalation aerosol, and acetylcysteine spraying agent is collected in Chinese pharmacopoeia and acetylcysteine solution is collected in American pharmacopoeia. Originally, acetylcysteine was considered ineffective orally due to its low oral bioavailability, which was shown to be as effective as inhalation through many years of clinical studies. Gradually, various formulations are developed, including granules, solutions, effervescent tablets, injections and the like. The acetylcysteine granules are widely applied in China, are suitable for people in all stages, can improve the medicine taking compliance of patients, and have high popularity.
In view of the specific physicochemical properties of acetylcysteine, when developing acetylcysteine granules, how to control the quality of the preparation stability so as to avoid reducing the curative effect of the active ingredient NAC is a key technology. In the prior art, the relevant patents relating to acetylcysteine granules for improving stability are as follows:
chinese patent application No. CN 102144978A discloses acetylcysteine granules and a preparation process thereof, the granules mainly comprise acetylcysteine, acrylic resin, mannitol, aspartame and orange essence, the technical scheme mainly improves the stability of the acetylcysteine granules through the preparation process, and the preparation method comprises the following steps: the acetylcysteine is coated by acrylic resin and then mixed with other auxiliary materials, but the technical defects are as follows: firstly, the preparation process is complex, and the acetylcysteine is coated after the acrylic resin is dissolved in an organic reagent, so that the use problem of the organic reagent is involved, the problems of organic reagent residue and the like need to be concerned in the later period, and the preparation process is more complex from the aspect of medicine quality control, so that the industrial development of acetylcysteine granules is not facilitated; secondly, the patent scheme cannot know whether the bioavailability of the acetylcysteine can be improved or not.
The patent discloses a pharmaceutical composition of acetylcysteine and a preparation method thereof, and the granular composition disclosed by the patent is acetylcysteine, sucrose, sweet orange essence, aspartame, sunset yellow and a flow aid, and the stability of acetylcysteine granules is improved by adding the flow aid (silicon dioxide or talcum powder) in a formula and a preparation process of mixing the auxiliary material with acetylcysteine and the flow aid after wet granulation. But the technical defects are as follows: firstly, the auxiliary materials in the preparation method are subjected to wet granulation independently, so that the difference between the granularity and the properties of the auxiliary materials and acetylcysteine is large, and the mixing uniformity is difficult to control in production; secondly, the patent scheme cannot know whether the bioavailability of the acetylcysteine can be improved or not.
In conclusion, the current research literature is not many how to improve the prescription of acetylcysteine granules, improve the stability of acetylcysteine by selecting a proper stabilizing agent, and improve the bioavailability of acetylcysteine.
The menthol crystal has cool, fresh and pleasant mint characteristic aroma, gives people a cold feeling, has a transparent aroma and a unique taste, is often used as a flavoring agent applied to medicines, perfumes, tobacco products and the like, and for example, Chinese patent with the publication number of CN 103191080A discloses an acetylcysteine effervescent tablet, wherein the flavoring agent in the prescription can be selected from the menthol crystal; further, for example, chinese patent publication No. CN 102028657a discloses an acetylcysteine liposome solid preparation, wherein the aromatic in the formulation can be selected from menthol. However, the application of menthol as a stabilizer to acetylcysteine granules has not been reported in the literature.
For example, chinese patent publication No. CN 105380957a discloses an acetylcysteine gel, its preparation method and application, wherein the formula contains a stabilizer selected from one or more of sodium bisulfite, sodium metabisulfite, sodium sulfite, sodium thiosulfate, ascorbic acid, thiourea, methionine, ethylenediaminetetraacetic acid, disodium ethylenediaminetetraacetate, and sodium citrate, and the formula also contains menthol, but the menthol is still used as a flavoring agent.
For another example, chinese patent publication No. CN 1997360a discloses a stabilized pharmaceutical composition of a fluoroether compound for anesthetic use, wherein a stabilizer is used to prevent degradation of the fluoroether compound, and the stabilizer is selected from propylene glycol, polyethylene glycol, a polyol of 2-methyl-2, 4-pentanediol and 1, 3-butanediol, or menthol. However, the drugs aimed at in the patent are fluoroether compounds such as sevoflurane and desflurane, and the physicochemical properties of the fluoroether compounds are different from those of acetylcysteine, so that the stabilizer mentioned in the patent is not suitable for developing acetylcysteine granules, and uncertainty exists.
Therefore, it is a technical problem that those skilled in the art have not solved to select menthol as a stabilizer for developing acetylcysteine granules and to select an appropriate formula ratio of acetylcysteine granules, so as to improve the stability of acetylcysteine and simultaneously improve the bioavailability of acetylcysteine.
Disclosure of Invention
The invention aims to solve the technical problem of providing a prescription and a process of acetylcysteine granules, wherein a proper amount of menthol is added as a stabilizing agent, and a fluidized bed one-step granulation process is adopted, so that the degradation of-SH groups in acetylcysteine is reduced, the stability of the medicine is improved, and the bioavailability of the medicine is improved.
In order to solve the technical problems, the invention adopts the following technical scheme:
the acetylcysteine granule comprises raw material acetylcysteine and auxiliary materials, wherein the auxiliary materials comprise a filling agent, menthol, a flavoring agent and essence, and the weight percentage of the menthol is 0.8-1.5%.
Preferably, in the granule, the weight percentages of acetylcysteine and auxiliary materials are as follows: 3 to 6 percent of acetylcysteine, 90 to 95 percent of filler, 0.8 to 1.5 percent of menthol, 0.5 to 3 percent of flavoring agent and 0.5 to 2 percent of essence.
More preferably, the bulking agent is one or more of sucrose, sorbitol, mannitol, and xylitol, and still more preferably sucrose.
More preferably, the flavoring agent is one or more of aspartame, saccharin sodium, acesulfame potassium and stevioside, and further preferably stevioside.
More preferably, the essence is apple essence, sweet orange essence, pineapple essence and banana essence, and more preferably sweet orange essence.
An acetylcysteine granule, the preferable prescription comprises the following components by weight: 5% of acetylcysteine, 92.46% of cane sugar, 1.2% of menthol, 0.67% of steviosin and 0.67% of orange essence.
An acetylcysteine granule, in the preferred prescription, the components and the weight ratio thereof are as follows: 3.33 percent of acetylcysteine, 93.17 percent of cane sugar, 1.5 percent of menthol, 1 percent of steviosin and 1 percent of orange essence.
An acetylcysteine granule, in the preferred prescription, the components and the weight ratio thereof are as follows: 3.33 percent of acetylcysteine, 92.2 percent of cane sugar, 0.8 percent of menthol, 3 percent of steviosin and 0.67 percent of orange essence.
A method for preparing acetylcysteine granules as described above, wherein the method comprises the steps of:
(1) pulverizing the raw materials, filler, Mentholum, and correctant, and sieving with 80 mesh sieve;
(2) mixing the raw materials, filler, Mentholum, and correctant;
(3) adding the mixture obtained in the step 2 into a fluidized bed, setting the air inlet temperature to be 40-50 ℃, adding purified water, granulating and drying;
(4) and (4) sieving the dry particles obtained in the step (3) by a 18-mesh sieve for finishing the particles.
(5) And (4) adding essence into the granules obtained in the step (4), and uniformly mixing to obtain the acetylcysteine granules.
Preferably, in step 3 of the preparation method, the temperature of the materials is controlled to be 35 +/-5 ℃ for granulation, the temperature of the materials is controlled to be 45 +/-5 ℃ for drying, and the water content is controlled to be 0.5% -1.5%.
The one-step granulation of the fluidized bed is to complete dry mixing, wet mixing, stirring, particle forming and drying of materials in the same fluidized bed equipment, the whole production is carried out in a sealed environment, the pollution of the outside to medicines can be prevented, a large number of operation links are reduced, the production time is saved, and the production efficiency is obviously improved. In the fluidized bed one-step granulation process, granulation and drying processes are carried out simultaneously, so that the time of the moisture-proof materials contacting the wet environment can be greatly reduced, and meanwhile, the dynamic drying efficiency is high, the requirement on the drying temperature is not high, and the method is also suitable for high-temperature sensitive medicines. In addition, the granules prepared by the fluidized bed granulation technology have uniform granularity, good mixing uniformity and fluidity and convenient subpackage.
Compared with the prior art, the acetylcysteine granules and the preparation method thereof provided by the invention have the following beneficial effects:
the formula of the invention adopts the menthol which is added with the stabilizer accounting for 0.8 to 1.5 percent by weight, the technique adopts the fluidized bed one-step granulation technique, the preparation technique has high efficiency and no pollution, the stability of the preparation is improved, and the maximum plasma concentration (C) can be reached within 0.5 to 1 hour after the preparation is taken max ) The onset time is obviously accelerated, and the bioavailability is obviously improved.
Drawings
FIG. 1 is a graph of the drug time profile for each group of samples in the bioavailability test experiment.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the scope of the present invention is not limited to these examples. All changes, modifications and equivalents that do not depart from the spirit of the invention are intended to be included within the scope thereof.
Example 1 formulation and Process of granules of acetylcysteine
The prescription is shown below, and the ratio of the dosage of each component to the (unit: mg) weight is as follows by taking the total amount as 3 g/bag:
acetylcysteine 100(3.33%)
Sucrose 2766(92.2%)
Menthol crystal 24(0.8%)
Stevia rebaudianum extract 90(3.0%)
Sweet orange essence 20(0.67%)
The preparation method is as follows:
(1) pulverizing acetylcysteine, sucrose, menthol and steviosin in prescribed amount, and sieving with 80 mesh sieve;
(2) evenly mixing acetylcysteine, cane sugar, menthol and steviosin according to the prescription amount;
(3) adding the mixture into a fluidized bed, setting the air inlet temperature to be 45 ℃, adding purified water, granulating and drying, wherein the process conditions are as follows: controlling the temperature of the materials to be 35 +/-5 ℃ in the granulating process, controlling the temperature of the materials to be 45 +/-5 ℃ in the drying process, and drying until the moisture of the dry granules is 0.5-1.5%;
(4) the dry particles are granulated by a sieve with 18 meshes;
(5) and adding sweet orange essence into the dry particles, and uniformly mixing to obtain the acetylcysteine particles.
Example 2 formulation and Process of acetylcysteine granules
The prescription is shown below, and the ratio of the dosage of each component to the (unit: mg) weight is as follows by taking the total amount as 3 g/bag:
acetylcysteine 180(6.0%)
Sucrose 2700(90.0%)
Menthol 45(1.5%)
Stevia rebaudianum extract 15(0.5%)
Sweet orange essence 60(2.0%)
The preparation method comprises the following steps:
(1) pulverizing acetylcysteine, sucrose, menthol and steviosin in prescribed amount, and sieving with 80 mesh sieve;
(2) evenly mixing acetylcysteine, cane sugar, menthol and steviosin according to the prescription amount;
(3) adding the mixture into a fluidized bed, setting the air inlet temperature to be 40 ℃, adding purified water, granulating and drying, wherein the process conditions are as follows: controlling the temperature of the materials to be 35 +/-5 ℃ in the granulating process, controlling the temperature of the materials to be 45 +/-5 ℃ in the drying process, and drying until the moisture of the dry granules is 0.5-1.5%;
(4) the dry particles are granulated by a sieve with 18 meshes;
(5) and adding sweet orange essence into the dry particles, and uniformly mixing to obtain the acetylcysteine particles.
Example 3 formulation and Process of granular formulation of acetylcysteine
The prescription is shown below, and the ratio of the dosage of each component to the (unit: mg) weight is as follows by taking the total amount as 3 g/bag:
acetylcysteine 90(3.0%)
Sucrose 2850(95.0%)
Menthol crystal 27(0.9%)
Stevia rebaudianum extract 18(0.6%)
Sweet orange essence 15(0.5%)
The preparation method is as follows:
(1) pulverizing acetylcysteine, sucrose, menthol and steviosin in prescribed amount, and sieving with 80 mesh sieve;
(2) evenly mixing acetylcysteine, cane sugar, menthol and stevioside according to the prescription amount;
(3) adding the mixture into a fluidized bed, setting the air inlet temperature to be 50 ℃, adding purified water, granulating and drying, wherein the process conditions are as follows: controlling the temperature of the materials to be 35 +/-5 ℃ in the granulating process, controlling the temperature of the materials to be 45 +/-5 ℃ in the drying process, and drying until the moisture of the dry granules is 0.5-1.5%;
(4) the dry particles are granulated by a sieve with 18 meshes;
(5) and adding sweet orange essence into the dry particles, and uniformly mixing to obtain the acetylcysteine particles.
Example 4 formulation and Process of acetylcysteine granules
The prescription is shown below, and the ratio of the dosage of each component to the (unit: mg) weight is as follows by taking the total amount as 3 g/bag:
acetylcysteine 120(4.0%)
Sucrose 2781(92.7%)
Menthol 30(1.0%)
Stevia rebaudianum extract 24(0.8%)
Sweet orange essence 45(1.5%)
The preparation method comprises the following steps:
(1) pulverizing acetylcysteine, sucrose, menthol and steviosin in prescribed amount, and sieving with 80 mesh sieve;
(2) evenly mixing acetylcysteine, cane sugar, menthol and stevioside according to the prescription amount;
(3) adding the mixture into a fluidized bed, setting the air inlet temperature to be 50 ℃, adding purified water, granulating and drying, wherein the process conditions are as follows: controlling the temperature of the materials to be 35 +/-5 ℃ in the granulating process, controlling the temperature of the materials to be 45 +/-5 ℃ in the drying process, and drying until the moisture of the dry granules is 0.5-1.5%;
(4) sieving the dry granules with 18 mesh sieve;
(5) and adding sweet orange essence into the dry particles, and uniformly mixing to obtain the acetylcysteine particles.
Example 5 formulation and Process of granular formulation of acetylcysteine
The prescription is shown below, and the ratio of the dosage of each component to the (unit: mg) weight is as follows by taking the total amount as 3 g/bag:
acetylcysteine 150(5.0%)
Sucrose 2774(92.46%)
Menthol crystal 36(1.2%)
Stevia rebaudianum extract 20(0.67%)
Sweet orange essence 20(0.67%)
The preparation method comprises the following steps:
(1) pulverizing acetylcysteine, sucrose, menthol and steviosin in prescribed amount, and sieving with 80 mesh sieve;
(2) evenly mixing acetylcysteine, cane sugar, menthol and stevioside according to the prescription amount;
(3) adding the mixture into a fluidized bed, setting the air inlet temperature to be 50 ℃, adding purified water, granulating and drying, wherein the process conditions are as follows: controlling the temperature of the materials to be 35 +/-5 ℃ in the granulating process, controlling the temperature of the materials to be 45 +/-5 ℃ in the drying process, and drying until the moisture of the dry granules is 0.5-1.5%;
(4) the dry particles are granulated by a sieve with 18 meshes;
(5) and adding sweet orange essence into the dry particles, and uniformly mixing to obtain the acetylcysteine particles.
Example 6 formulation and Process of granules of acetylcysteine
The prescription is shown below, and the ratio of the dosage of each component to the (unit: mg) weight is as follows by taking the total amount as 3 g/bag:
acetylcysteine 100(3.33%)
Sucrose 2795(93.17%)
Menthol crystal 45(1.5%)
Stevia rebaudianum extract 30(1.0%)
Sweet orange essence 30(1.0%)
The preparation method comprises the following steps:
(1) pulverizing acetylcysteine, sucrose, menthol and steviosin in prescribed amount, and sieving with 80 mesh sieve;
(2) evenly mixing acetylcysteine, cane sugar, menthol and stevioside according to the prescription amount;
(3) adding the mixture into a fluidized bed, setting the air inlet temperature to be 50 ℃, adding purified water, granulating and drying, wherein the process conditions are as follows: controlling the temperature of the materials to be 35 +/-5 ℃ in the granulating process, controlling the temperature of the materials to be 45 +/-5 ℃ in the drying process, and drying until the moisture of the dry granules is 0.5-1.5%;
(4) the dry particles are granulated by a sieve with 18 meshes;
(5) and adding sweet orange essence into the dry particles, and uniformly mixing to obtain the acetylcysteine particles.
EXAMPLE 7 Effect of selection of stabilizer types on formulation Properties
In this example, only the type of stabilizer is changed, the components and the amounts of the other formulations are not changed, the preparation method is not changed, and the influence of the selection of the type of stabilizer on the stability of the preparation is examined.
The stabilizer is selected from: propylene glycol, sodium thiosulfate and menthol.
The experimental method comprises the following steps: acetylcysteine granules are prepared by using acetylcysteine, cane sugar, a stabilizer, steviosin and orange essence with the same dosage as a prescription, the acetylcysteine granules are placed for six months under the conditions of 0 day and accelerated post-packaging of a paper/aluminum composite film bag (the temperature is 40 ℃ plus or minus 2 ℃ and the relative humidity is 75 percent plus or minus 5 percent), and the stability test results are shown in table 1:
TABLE 1 stability comparison after 0 days of standing and six months accelerated
Figure GDA0003576190030000071
Criteria for judging significant differences in stability: according to the ICH three-party coordination guidance principle: stability test of new crude drug and preparation "2.2.7.1 general case" on page 15 of Q1A (R2) specifies: typically a "significant difference" in the formulation is defined as a difference of 5% from the initial value.
As can be seen from table 1, after accelerated for 6 months, the stabilizer was acetylcysteine granules of menthol, and the content, single impurity and total impurity were not significantly changed, indicating that the stability was good. The stabilizer is acetylcysteine granules of propylene glycol and sodium thiosulfate, the content of the acetylcysteine granules is reduced by more than 8 percent, and the acetylcysteine granules have obvious change and do not accord with the stability quality control regulation of the preparation.
In conclusion, the invention determines to select the menthol crystal as the stabilizer in the prescription of the acetylcysteine granules.
EXAMPLE 8 examination of the influence of selection of the amount of stabilizer and Process on the stability of the preparation
On the basis of selecting the menthol as the stabilizing agent, the applicant further examines the influence of the dosage change and the process change of the stabilizing agent on the stability of the preparation.
Comparative examples 6-1, 6-2, 6-3, 6-4 of example 6 were designed as follows:
comparative example 6-1 was prepared in the same manner as in example 6, except that menthol was not added to the formulation, the amount of menthol was replaced with sucrose as a filler, and acetylcysteine, steviosin and orange essence were used in the same amounts as in example 6.
The comparative example 6-2 was prepared in the same manner as in example 6, except that the amount of menthol in the formulation was set to 0.7%, the amounts of acetylcysteine, steviosin and orange flavor were set to the same amounts as in example 6, and the amount of sucrose was adjusted to make the total amount of the entire formulation 100%.
The comparative examples 6 to 3 were prepared in the same manner as in example 6, except that the amount of menthol in the formulation was 1.6%, the amounts of acetylcysteine, steviosin and orange flavor were the same as in example 6, and the amount of sucrose was adjusted to make the total amount of the entire formulation 100%.
The formulation of comparative examples 6-4 was the same as example 6, and the preparation method was changed to a high shear wet granulation process (see step 3 for differences), and the specific steps were as follows:
(1) pulverizing acetylcysteine, sucrose, menthol and steviosin according to the prescription amount, and sieving with a 80-mesh sieve for later use;
(2) evenly mixing acetylcysteine, cane sugar, menthol and steviosin according to the prescription amount;
(3) adding the mixture into a high shear wet granulator, and adding purified water for granulation;
(4) adding the wet particles into a fluidized bed, and drying at the set air inlet temperature of 50 ℃;
(5) the dry particles are granulated by a sieve with 18 meshes;
(6) and adding sweet orange essence into the dry particles, and uniformly mixing to obtain the acetylcysteine particles.
Meanwhile, a commercial acetylcysteine granule product (A) is selected
Figure GDA0003576190030000082
Prescription in accordance with the original study) as a control, and examples 1 to 6 and comparative examples 6-1 to 6-4 were left for six months under accelerated conditions (temperature 40 ℃ ± 2 ℃, relative humidity 75% ± 5%) after being packed in a paper/aluminum composite film bag, and the results of the stability test are shown in table 2:
TABLE 2 stability comparison after 0 days of standing and six months accelerated
Figure GDA0003576190030000081
Criteria for judging significant differences in stability: according to the ICH three-party coordination guidance principle: stability test of new crude drug and preparation "2.2.7.1 general case" on page 15 of Q1A (R2) specifies: typically, a "significant difference" in a formulation is defined as a 5% difference in content from the initial value.
As can be seen from table 2, it is,
1) after the acceleration of 6 months, the related substances of the samples of the examples 1 to 6 prepared by the invention are not increased, but the impurities of the reference products sold in the market are obviously increased, and the difference is large, so that the stability of the samples of the examples 1 to 6 prepared by the invention is better than that of the original research.
2) Similarly, the samples of comparative examples 6-1 to 6-4, after accelerated for 6 months, showed a deviation of more than 5% from 0 days and a significant increase in impurities, indicating that there was a significant difference in formulation stability when the high shear wet granulation process was used without menthol, with menthol usage of less than 0.8 or greater than 1.5.
EXAMPLE 9 Effect of selection of the amount of stabilizer on the bioavailability of the formulations
On the basis of selecting comparative examples 6-1 to 6-4 of example 8, a commercially available control, the stabilizer was selected to be menthol, and the applicant further examined the effect of changes in the amount of the stabilizer on the bioavailability of the formulation.
Examples 1, 5, 6, and comparative examples 6-1 to 6-3 and commercial controls were subjected to pharmacokinetic tests to compare bioavailability. The specific test method is as follows:
42 healthy Beagle dogs with half male and female bodies and a body weight of (10 +/-1.0) kg are selected. 14d before experiment, without any drug, compared with 1d 20: 00 fasting was started, with the test at 7: 00 taking the preparation in a specified dosage on an empty stomach, and eating 4h after taking the preparation.
The dosing regimen was designed using a single-site, randomized, parallel, control trial. 42 test dogs were randomly numbered and randomly divided into A, B, C, D, E, F, G groups of 6 dogs each. Example 1, example 5, example 6, comparative example 6-1-6-3 and the commercially available drugs were taken at random. The random grouping and dosing schedule is shown in table 3 below. The 7 formulations were all administered orally. Before taking medicine (0h) and 0.25, 0.5, 0.75, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 5.0, 6.0 and 8.0h after taking medicine, 3.0ml of blood is taken from forelimb veins and placed in an anticoagulation tube for medicine concentration analysis, and the time curve of the experimental result is shown in figure 1.
TABLE 3 dosing regimen
Randomized grouping of test dogs Taking medicine
A(7,12,18,25,27,31) Example 1
B(5,6,13,22,30,37) Example 5
C(1,4,19,23,26,34,) Example 6
D(2,11,15,21,33,38) Comparative example 6-1
E(8,10,20,28,32,40) Comparative examples 6 to 2
F(14,16,24,29,35,41) Comparative examples 6 to 3
G(3,9,17,36,39,42) Commercial control
As can be seen from the figure 1 of the drawings,
1) example 1 (menthol to 0.8%), example 5 (menthol to 1.2%) and example 6 (menthol to 1.5%) of the present invention peaked in Beagle canine plasma levels within 1 hour after dosing, while comparative example 6-1 (no menthol added), comparative example 6-2 (menthol to 0.7%), comparative example 6-3 (menthol to 1.6%), and commercial products peaked only 2 hours after dosing. The invention shows that the menthol granule with the weight ratio of 0.8-1.5% is easier to absorb and has the characteristic of quick effect.
2) Taking the bioavailability of the commercial reference substance as a reference line 100%, the bioavailability of each group of samples relative to the commercial reference substance is calculated as:
the bioavailability of the present invention is 131.40% for example 1 (menthol to 0.8%), 139.14% for example 5 (menthol to 1.2%) and 132.45% for example 6 (menthol to 1.5%);
the bioavailability was 97.01% for comparative example 6-1 (without menthol), 90.56% for comparative example 6-2 (menthol to 0.7%) and 87.65% for comparative example 6-3 (menthol to 1.6%).
Therefore, when the dose of the menthol is less than 0.8 or more than 1.5 without adding the menthol, the bioavailability cannot be obviously improved, and the effect is inferior to that of the original research; the dosage of the menthol is only 0.8-1.5, so that the bioavailability can be obviously improved, and the effect is better than that of the original research.

Claims (13)

1. The acetylcysteine granules are composed of raw materials of acetylcysteine and auxiliary materials, and are characterized in that the acetylcysteine granules are prepared by adopting a fluidized bed one-step granulation process; the auxiliary materials comprise a filling agent, menthol, a flavoring agent and essence, wherein the weight percentage of the menthol is 0.8-1.5%.
2. The acetylcysteine granule according to claim 1, wherein the granule comprises acetylcysteine and excipients in the following weight percentages: 3 to 6 percent of acetylcysteine, 90 to 95 percent of filler, 0.8 to 1.5 percent of menthol, 0.5 to 3 percent of flavoring agent and 0.5 to 2 percent of essence.
3. Acetylcysteine granules according to claim 1 or 2, wherein the bulking agent is one or more of sucrose, sorbitol, mannitol, xylitol.
4. The acetylcysteine granule according to claim 3, wherein the bulking agent is sucrose.
5. Acetylcysteine granules according to claim 1 or 2, wherein the flavoring agent is one or more of aspartame, saccharin sodium, acesulfame potassium, and stevioside.
6. The acetylcysteine granule according to claim 5, wherein the flavoring agent is stevia.
7. Acetylcysteine granules according to claim 1 or 2, wherein the essence is apple essence, sweet orange essence, pineapple essence, banana essence.
8. The acetylcysteine granule according to claim 7, wherein the flavor is orange flavor.
9. The acetylcysteine granule according to claim 1 or 2, wherein the formulation comprises the following components by weight: 5% of acetylcysteine, 92.46% of cane sugar, 1.2% of menthol, 0.67% of steviosin and 0.67% of orange essence.
10. The acetylcysteine granule according to claim 1 or 2, wherein the formulation comprises the following components by weight: 3.33 percent of acetylcysteine, 93.17 percent of cane sugar, 1.5 percent of menthol, 1 percent of steviosin and 1 percent of orange essence.
11. The acetylcysteine granule according to claim 1 or 2, wherein the formulation comprises the following components by weight: 3.33 percent of acetylcysteine, 92.2 percent of cane sugar, 0.8 percent of menthol, 3 percent of steviosin and 0.67 percent of orange essence.
12. A process for the preparation of acetylcysteine granules according to claim 1, wherein a fluid bed one-step granulation process is selected, comprising the steps of:
(1) pulverizing the raw materials, filler, Mentholum, and correctant, and sieving with 80 mesh sieve;
(2) mixing the raw materials, filler, Mentholum, and correctant;
(3) adding the mixture obtained in the step (2) into a fluidized bed, setting the air inlet temperature to be 40-50 ℃, adding purified water, granulating and drying;
(4) taking the dry particles obtained in the step 3, and sieving the dry particles with a 18-mesh sieve for finishing the particles;
(5) and (5) adding essence into the granules obtained in the step (4), and uniformly mixing to obtain the acetylcysteine granules.
13. The method for preparing acetylcysteine granules according to claim 12, wherein in step 3, the temperature of the material is controlled to 35 ± 5 ℃ for granulation, the temperature of the material is controlled to 45 ± 5 ℃ for drying, and the moisture is controlled to 0.5% -1.5%.
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