CN104546675A - Estazolam composition freeze-dried tablet and preparation method thereof - Google Patents

Abstract

The invention provides an estazolam composition freeze-dried tablet and a preparation method thereof, and relates to the technical field of medicines and medicine production. The estazolam composition freeze-dried tablet comprises estazolam, starch and cane sugar, wherein the starch and the cane sugar are taken as auxiliary materials. Common corn starch is treated by a heating process, so that the bonding and disintegration functions of the starch in the tablet can be improved, and the formability of the tablet is improved. The estazolam composition freeze-dried tablet only needs two auxiliary materials namely the starch and the cane sugar. The estazolam composition freeze-dried tablet adopts the freeze-drying process that temperature is reduced and increased for two times respectively, and the process that temperature is reduced and increased for two times enables the formability of the tablet to be better and increases the dissolution rate of the tablet so as to improve the biological availability of the tablet; the tablet overcomes the defects of a common estazolam tablet, the types and dosage of auxiliary materials in the estazolam tablet are reduced, the dissolution rate of the tablet is high, the biological availability of the tablet is high, and the curative effect and the safety of clinical medication are ensured.

Description

A kind of estazolam composition freeze-drying sheet and preparation method thereof

Technical field

The present invention relates to medicine and medical production technical field, be specifically related to a kind of estazolam composition freeze-drying sheet and preparation method thereof.

Background technology

This product is Benzodiazepines antianxiety drugs, is mainly used in anxiety, insomnia.Also for anxiety, fear and Kang epilepsy and convulsion.

molecular formula C ₁₆h ₁₁clN ₄, molecular weight 294.74

In common estazolam tablets containing supplementary product kind and quantity more, generally to use filler, lubricant, disintegrating agent, adhesive, correctives etc., according to Chinese Pharmacopoeia (2010 editions) second estazolam tablets quality standard, the dissolution of estazolam tablets reached more than 70% for qualified 45 minutes time, and increasing research shows that impurity in the incompatibility of the toxic and side effects of adjuvant itself, adjuvant and principal agent, adjuvant etc. all can have an impact to the safety of medicine.

Therefore, provide one can overcome above-mentioned shortcoming, select suitable adjuvant and technique, reduce supplementary product kind and consumption in estazolam tablets, improve dissolution and the bioavailability of estazolam tablets, ensure that the safety of clinical application all has positive effect.

Traditional lyophilizing tablet can improve dissolution and bioavailability, but still need use the adjuvant such as mannitol, gelatin.And mannitol has certain biological activity, gelatin resource-constrained and perishable.

Starch is the basic adjuvant of oral solid formulation, it is polymerized by glucose molecule, and be commonly used for adhesive, diluent and disintegrating agent in tablets, it is cheap and easy to get, to human-body safety, but being used alone starch has no report as adjuvant freeze-dry process production estazolam lyophilizing sheet.

Summary of the invention

Technical problem to be solved by this invention is the defect overcoming prior art, and propose a kind of estazolam composition freeze-drying sheet and preparation method thereof further, said preparation adjuvant is few, good stability, and bioavailability is high.

Technical problem to be solved by this invention realizes by the following technical solutions:

A kind of estazolam composition freeze-drying sheet, adjuvant is done with starch and sucrose, produce with freeze-dry process, this tablet overcomes the shortcoming of above-mentioned common estazolam tablets, decrease supplementary product kind and consumption in estazolam tablets, this sheet dissolution is large, and bioavailability is high, ensure that curative effect and the safety of clinical application.

A kind of estazolam composition freeze-drying sheet, is prepared from by following raw material:

A preparation method for estazolam composition freeze-drying sheet, comprises step as follows:

A, take the starch of component amount, add a certain amount of purified water and stir, by pH adjusting agent, the pH value of solution is controlled between 5-7.5, be then heated to 72 DEG C, be incubated 20 minutes, make the corn starch solution of 5 ~ 15% (W/V);

B, measure purified water 45ml, boil, add 85g sucrose, stir, after dissolving, continue to be heated to 100 DEG C, filter with purified cotton, the appropriate hot distilled water of filter is cleaned, and washing liquid and filtrate merge, and let cool, add appropriate distilled water, make full dose become 100mL, stir evenly, obtain B solution;

The solution that C, the solution and the step B that steps A are obtained obtain mixes, and fully stirs 30 minutes, is down to room temperature and obtains Semen Maydis-sucrose solution;

D, take estazolam 1 gram, add in 1L Semen Maydis-sucrose solution, stir 25 ~ 35 minutes;

Medicinal liquid is sub-packed in drug-containing dish after measuring estazolam content by E, medicinal liquid, each drug-containing dish dress 1.0ml;

F, the drug-containing dish that medicinal liquid is housed is put into vacuum freezing drying oven, be cooled to subzero 45 DEG C, keep 2 hours, evacuation, then 0 DEG C is warming up to gradually, keep 2 hours, then be cooled to subzero 45 DEG C, keep 2 hours, be warming up to 0 DEG C gradually again, keep 2 ~ 4 hours, then be warming up to 28 ~ 32 DEG C of dryings 4 ~ 6 hours gradually, whole process vacuum remains on 10 handkerchiefs; Finally the drug-containing dish lid of powder charge is covered tightly, and load aluminium foil bag and carry out sealing and obtain estazolam composition freeze-drying sheet.

Described starch selects corn starch, preferably the corn starch solution of 10% (W/V).

Beneficial effect of the present invention is:

The preparation method of a kind of estazolam composition freeze-drying sheet of the present invention, heating process process is carried out to common corn starch, starch bonding in tablets, disintegration can be improved, improve the mouldability of tablet, in estazolam composition freeze-drying sheet, dosage of sucrose is 8.5% (W/V), it is the hardness reinforcer of this tablet, and plays flavored action.Estazolam composition freeze-drying sheet only needs starch and sucrose two kinds of adjuvants.The freeze-dry process of two liters falls in estazolam composition freeze-drying sheet employing two, and twice cooling, twice intensification can make sheet mouldability better, which increase the dissolution of tablet, thus improve the bioavailability of tablet.

Accompanying drawing explanation

Fig. 1 is the dissolution correlation curve figure of estazolam in experiment.

Detailed description of the invention

The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with specific embodiment, set forth the present invention further, but following embodiment being only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art under the prerequisite not making creative work obtain other embodiment, all belong to the protection domain of this patent.

Embodiment 1

A, take the corn starch of 100g, the purified water adding 900ml stirs, and controls at 5.6-7.0, is then heated to 72 DEG C, keep 120 minutes, make the corn starch solution of 9% (W/V) by pH adjusting agent by the pH value of solution.

B, measure purified water 45ml, boil, add 85g sucrose, stir, after dissolving, continue to be heated to 100 DEG C, filter with purified cotton, the appropriate hot distilled water of filter is cleaned, and washing liquid and filtrate merge, and let cool, add appropriate distilled water, make full dose become 100mL, stir evenly, obtain B solution.

The solution that C, the solution and the step B that steps A are obtained obtain mixes, and fully stirs 30 minutes, after solution be down to room temperature obtain Semen Maydis-sucrose solution.

D, take estazolam 1g, add in 1L Semen Maydis-sucrose solution, stir 30 minutes.

Medicinal liquid is sub-packed in drug-containing dish after measuring estazolam content by E, medicinal liquid, each drug-containing dish dress 1.0ml.

F, the drug-containing dish that medicinal liquid is housed is put into vacuum freezing drying oven, be cooled to subzero 45 DEG C, keep 2 hours, evacuation, then 0 DEG C is warming up to gradually, keep 2 hours, then be cooled to subzero 45 DEG C, keep 2 hours, be warming up to 0 DEG C gradually again, keep 2 ~ 4 hours, then be warming up to 28 ~ 32 DEG C of dryings 4 ~ 6 hours gradually, whole process vacuum remains on 10 handkerchiefs.Finally the drug-containing dish lid of powder charge is covered tightly, and load aluminium foil bag and carry out sealing and obtain estazolam composition freeze-drying sheet.

Embodiment 2

A, take the corn starch of 130g, the purified water adding 900ml stirs, and controls at 5.6-7.0, is then heated to 72 DEG C, keep 120 minutes, make the corn starch solution of 13% (W/V) by pH adjusting agent by the pH value of solution.

B, measure purified water 45ml, boil, add 85g sucrose, stir, after dissolving, continue to be heated to 100 DEG C, filter with purified cotton, the appropriate hot distilled water of filter is cleaned, and washing liquid and filtrate merge, and let cool, add appropriate distilled water, make full dose become 100mL, stir evenly, obtain B solution.

The solution that C, the solution and the step B that steps A are obtained obtain mixes, and fully stirs 30 minutes, after solution be down to room temperature obtain Semen Maydis-sucrose solution.

D, take estazolam 1 gram (by 1000 calculations), add 1L Semen Maydis-sucrose solution, stir 30 minutes.

Medicinal liquid is sub-packed in drug-containing dish after measuring estazolam content by E, medicinal liquid, each drug-containing dish dress 1.0ml.

F, the drug-containing dish that medicinal liquid is housed is put into vacuum freezing drying oven, be cooled to subzero 45 DEG C, keep 2 hours, evacuation, then 0 DEG C is warming up to gradually, keep 2 hours, then be cooled to subzero 45 DEG C, keep 2 hours, be warming up to 0 DEG C gradually again, keep 2 ~ 4 hours, then be warming up to 28 ~ 32 DEG C of dryings 4 ~ 6 hours gradually, whole process vacuum remains on 10 handkerchiefs.Finally the drug-containing dish lid of powder charge is covered tightly, and load aluminium foil bag and carry out sealing and obtain estazolam composition freeze-drying sheet.

Experimental data

The estazolam composition freeze-drying sheet that above-described embodiment is obtained carries out following quality research test:

1, hardness, friability contrast test

Get estazolam composition freeze-drying sheet prepared by above-described embodiment respectively and estazolam ordinary tablet (commercially available) detects friability and hardness by " Chinese Pharmacopoeia " version in 2010 two annex XG inspection techniques, carried out comparative study, the results are shown in following table:

Sample	Hardness/N	Friability
			Execute example 1	68	<1％
Execute example 2	63	<1％
			Ordinary tablet	66	<1％

Experimental data shows, estazolam composition freeze-drying sheet and ordinary tablet (commercially available) without significant difference, meet " Chinese Pharmacopoeia " version in 2010 to the requirement of tablet on friability and hardness.

2, dissolution contrast test

(No. 1 to No. 3 is embodiment 1 to get estazolam tablets (commercially available) and each 6 of estazolam composition freeze-drying sheet, No. 4 to No. 6 is embodiment 2), press Chinese Pharmacopoeia (2010 editions) second dissolution method (annex XC second method) respectively, (phosphoric acid ammonia disodium 10g is got with phosphate buffer, add water 1000ml. phosphoric acid regulating ph value to 8.5) 500ml is dissolution medium, rotating speed is 75 turns per minute, operate in accordance with the law, through 15min, 25min, 45min, 65min, during 75min minute, get solution to filter, get subsequent filtrate as need testing solution, separately get estazolam reference substance and be about 30mg, accurately weighed, put in 100ml measuring bottle, add dimethyl methyl Milling amine 10ml and make dissolving, be diluted to scale with dissolution medium, shake up, precision measures 10m, puts in 50ml measuring bottle, be diluted to scale with dissolution medium, shake hook, in contrast product solution.Get above-mentioned two kinds of solution respectively according to ultraviolet visible spectrophotometry (annex IV A), measure absorbance at the wavelength place of 268nm, the stripping quantity of the every sheet of meter grate.Result is as follows:

One, estazolam tablets (commercially available)

Two, estazolam lyophilizing sheet (No. 1 to No. 3 is embodiment 1, and No. 4 to No. 6 is embodiment 2)

Respectively with catch cropping Dissolution profiles during average dissolution pair, as Fig. 1.

Four, result judges

Judge according to Chinese Pharmacopoeia (2010 editions) second estazolam tablets quality standard, the dissolution of estazolam tablets (commercially available) reached more than 70% for qualified 45 minutes time, actual measurement is 72.4%, and estazolam lyophilizing sheet dissolution 25 minutes time reaches 77.3%.It can thus be appreciated that the time that estazolam lyophilizing sheet dissolution reaches 70% decreased for about 44.4% (20 minutes) time than estazolam tablets (commercially available).So the estazolam lyophilizing sheet blood drug level peaking time is shorter than estazolam tablets (commercially available), and bioavailability is higher, better efficacy.

More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description is only preference of the present invention; be not used for limiting the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.

Claims (2)

1. an estazolam composition freeze-drying sheet, is characterized in that, is prepared from by following raw material:

2. a preparation method for estazolam composition freeze-drying sheet according to claim 1, is characterized in that, comprise step as follows:

A, take the starch of component amount, add a certain amount of purified water and stir, by pH adjusting agent, the pH value of solution is controlled between 5-7.5, be then heated to 72 DEG C, be incubated 20 minutes, make the corn starch solution of 5 ~ 15% (W/V);

B, measure purified water 45ml, boil, add 85g sucrose, stir, after dissolving, continue to be heated to 100 DEG C, filter with purified cotton, the appropriate hot distilled water of filter is cleaned, and washing liquid and filtrate merge, and let cool, add appropriate distilled water, make full dose become 100mL, stir evenly, obtain B solution;

The solution that C, the solution and the step B that steps A are obtained obtain mixes, and fully stirs 30 minutes, is down to room temperature and obtains Semen Maydis-sucrose solution;

D, take estazolam 1 gram, add in 1L Semen Maydis-sucrose solution, stir 25 ~ 35 minutes;

Medicinal liquid is sub-packed in drug-containing dish after measuring estazolam content by E, medicinal liquid, each drug-containing dish dress 1.0ml;

F, the drug-containing dish that medicinal liquid is housed is put into vacuum freezing drying oven, be cooled to subzero 45 DEG C, keep 2 hours, evacuation, then 0 DEG C is warming up to gradually, keep 2 hours, then be cooled to subzero 45 DEG C, keep 2 hours, be warming up to 0 DEG C gradually again, keep 2 ~ 4 hours, then be warming up to 28 ~ 32 DEG C of dryings 4 ~ 6 hours gradually, whole process vacuum remains on 10 handkerchiefs; Finally the drug-containing dish lid of powder charge is covered tightly, and load aluminium foil bag and carry out sealing and obtain estazolam composition freeze-drying sheet.