The pharmaceutical composition that contains rifampicin and isoniazid
Technical field:
The present invention relates to a kind of pharmaceutical composition that contains rifampicin and isoniazid, be specifically related to a kind of rifampicin of pH regulator agent and pharmaceutical composition of isoniazid of containing.
Background technology:
The compound preparation that contains rifampicin and isoniazid is that WHO (World Health Organization (WHO)) worldwide recommends as treatment choice drug lungy, through for many years clinical research confirmation its curative effect and safety.Compare with using single preparations of ephedrine respectively, have taking convenience, untoward reaction is few, drug resistance is low, the patient dependence advantages of higher.
But, contain the compound preparation poor stability of rifampicin and isoniazid, produce, in the storage, rifampicin and isoniazid are easily degraded, thereby influence the quality of product.Reason is as follows:
1. the rifampicin aqueous solution is very unstable, easily degraded
Through experiment confirm, the degraded of rifampicin mainly is the hydrolysis that carries out under solvent participates in rifampicin and the isoniazid compound solid preparation.Although the stability of rifampicin in solid preparation is higher in semi-solid preparation and solution, but still easily degrades.Because synthesis result of residual moisture, medicine isoniazid and some adjuvant moisture absorptions etc. etc. in a spot of water that solid preparation Chinese medicine and adjuvant contain, the wet granulation.
2. quicken the degraded of rifampicin when isoniazid exists
Document shows; at the flat 3-formoxyl Rifamycin Sodium that is decomposed into of acid condition diarrhea good fortune; when having isoniazid; 3-formoxyl Rifamycin Sodium and isoniazid reaction; become a kind of polymer: 3-formoxyl rifamycin ftivazide; the latter can quicken again rifampicin degraded (S.Singh et al.Pharm Pharmacol Commun, 2000.No6:405-410).
For solving the problem of residual moisture in the wet granulation, there is bibliographical information in the production of solid preparation, to adopt dry granulation, though this can be avoided the moisture brought in the wet-granulation process, but still can't avoid rifampicin degraded because of quickening with contacting of isoniazid in solid preparation.Can not solve root problem.
For avoid rifampicin in preparation with the contacting of isoniazid, the method that Chinese patent CN 02136930.5 takes is that rifampicin and isoniazid are made double-deck clad sheet, and its label is carried out Cotton seeds.Though the mode of double-deck clad sheet can be kept apart rifampicin and isoniazid, this method has increased operation, has prolonged the process time, has also needed to add new equipment, and cost is higher.
The method that Chinese patent CN 94214080.X keeps apart rifampicin and isoniazid is that rifampicin is made medicated powder, and isoniazid, pyrazinamide, ebutol are made in flakes coating more respectively, then last four kinds of materials is incapsulated.The method has following shortcoming: 1) more XXL troublesome poeration, three kinds of tablets need be distinguished tabletting, coating, need to increase workman's number, activity time is long, and is very uneconomical.2) leave big space in the capsule.Because of isoniazid, pyrazinamide, ebutol all are tablets, after incapsulating, several tablets in the capsule make and leave big space in the capsule, fill the gap though can utilize the rifampicin powder in theory, but because the filling of capsule 's content substep on capsule filling machine is finished one by one, actual rifampicin powder does not have the effect of filling the tablet gap; 3) practical operation is infeasible.The capsule filling machine that cause is used at present has only four stations at most, and one of them station is used to hold capsule, so can only fill three kinds of materials at most in a capsule, fills the in fact very difficult realization of material more than three kinds if desired in capsule.4) be difficult to realize the accurate of rifampicin powder filling dose.
It is more that last two kinds of methods increase the medicine cost, concerning vast tuberculosis patient, increased the weight of financial burden.
Though have report to point out that the degradation reaction of rifampicin is subjected to the influence of pH,, still do not have final conclusion at present about to the stable p H environment of rifampicin.The most stable pH value of rifampicin of different bibliographical informations is had nothing in common with each other, 6.2~7.2 (Wang Mingyuan etc., pharmacy circular, 1980 are arranged, Vol 15 (3): 6), 6.08 (Gao Hongke, Chinese Hospitals pharmaceutical journal, 1988 are arranged, Vol 8 (12): 564), also have 6.0~7.0 (Zhou Jingyun etc., Chinese Pharmaceutical Journal, 1996.7 Vol, 31 (7) 406-409).
Summary of the invention:
The technical problem to be solved in the present invention provides a kind of pharmaceutical composition that contains rifampicin and isoniazid of good stability, and overcomes complicated operation, defect of high cost that prior art exists.
The present inventor is through experiment confirm, and the degraded of rifampicin is that pH is dependent, and pH is the degraded minimum of 5.5~7.5 o'clock rifampicin.The inventor proposes following technical scheme through intensive big quantity research:
In the preparation that contains rifampicin and isoniazid, add the pH regulator agent, the pH of the liquid phase environment of rifampicin degradation reaction in the control preparation, the degraded that slows down rifampicin, thereby the stability of assurance compound preparation.
Described pH regulator agent is selected from weak acid-salt of weak acid buffer system, weak base-weak base salt buffer system, or the acid salt buffer system, and described salt is sodium salt, potassium salt or ammonium salt;
Described weak acid-salt of weak acid buffer system is selected from acetic acid-acetate, citric acid-phosphate, citric acid-citrate, boric acid-borate, carbonic acid-carbonate; Preferred acetic acid-sodium acetate, acetic acid-ammonium acetate, citric acid-sodium hydrogen phosphate, citric acid-sodium citrate, carbonic acid-sodium carbonate or boric acid-sodium tetraborate;
Described weak base-weak base salt buffer system is ammonia-ammonium chloride;
Described acid salt buffer system is selected from one or both the mixture in phosphate, phthalate, acetate, citrate, the carbonate.Preferably phosphoric acid potassium dihydrogen-sodium hydrogen phosphate, sodium hydrogen phosphate-sodium dihydrogen phosphate, potassium dihydrogen phosphate-dipotassium hydrogen phosphate, Potassium Hydrogen Phthalate-phthalic acid potassium sodium, or sodium carbonate-sodium bicarbonate.
The content of above-mentioned pH regulator agent in pharmaceutical composition should be controlled at 0.1%~10% (w/w), is preferably 0.5%~5% (w/w).
Pharmaceutical composition of the present invention can also contain one or more other anti-tuberculosis drugs, example hydrochloric acid ethambutol, pyrazinamide etc. except that containing Rimactazid and pH regulator agent.
Can also contain conventional adjuvant, batching of other pharmaceutical preparation well known to those skilled in the art etc. in the pharmaceutical composition of the present invention.
Pharmaceutical composition of the present invention can adopt the preparation of conventional formulation technology.
The dosage form of pharmaceutical composition of the present invention can be dosage forms such as tablet, capsule or injectable powder.
Through adopting high performance liquid chromatography that pharmaceutical composition of the present invention and the Rimactazid compound preparation that does not add the pH regulator agent are tested, the pharmaceutical composition of the present invention that confirms to have added the pH regulator agent can effectively reduce the generation of the polymer (the mould SV ftivazide of the sharp good fortune of 3-formoxyl) that rifampicin and isoniazid degraded produced.By the different good fortune sheet (Rimactazid bigeminy compound recipe sheet) of the present invention preparation through national drug clinical research base Medical University Of Chongqing clinical pharmacology research department clinical research confirmation: contain rifampicin 300mg with every of Milan, ITA Gruppo Lepetit SPA pharmaceutical factory production import, the different good fortune sheet (trade name Rifinah) of isoniazid 150mg has bioequivalence.
Advantage of the present invention is:
1. the increase medicine stability reduces the degraded of production, storage and transportation Chinese medicine;
2. easy to operate, technology is simple;
3. do not need scrap build, with low cost.
Provide some specific embodiments below, be used to describe in detail this method, but do not limit the present invention with this.
The specific embodiment:
Embodiment 1 rifampicin and isoniazid compound recipe Film coated tablets
1000 tablet recipes:
Rifampicin 300g
Isoniazid 150g
Potassium dihydrogen phosphate 6g
Dipotassium hydrogen phosphate 12g
Microcrystalline Cellulose 40g
Polyvidone 10g
Cross-linking sodium carboxymethyl cellulose 7.5g
Magnesium stearate 6g
Method for making: Rimactazid, microcrystalline Cellulose, polyvidone, cross-linking sodium carboxymethyl cellulose, potassium dihydrogen phosphate, dipotassium hydrogen phosphate are crossed 80 eye mesh screens respectively; take by weighing above-mentioned powder and 4g magnesium stearate and mix homogeneously by recipe quantity; get dried granule with dry granulation mechanism; get tabletting behind dried granule and the 2g magnesium stearate mix homogeneously, control strip focuses on 520mg~540mg.Plain sheet carries out film coating with the Opadry coating material.
Embodiment 2 Rimactazids and pyrazinamide compound recipe Film coated tablets
1000 tablet recipes:
Rifampicin 120g
Isoniazid 80g
Pyrazinamide 250g
Citric acid 2g
Sodium hydrogen phosphate 9g
Microcrystalline Cellulose 45g
Polyvidone 10g
Cross-linking sodium carboxymethyl cellulose 8g
Magnesium stearate 5g
Method for making: former, adjuvant are crossed 80 eye mesh screens respectively, taken by weighing the 3g magnesium stearate and take by weighing other former, adjuvants by recipe quantity; mixing; get dried granule with dry granulation mechanism, get tabletting behind dried granule and the 2g magnesium stearate mix homogeneously, control strip focuses on 520mg~540mg.Plain sheet carries out film coating with the Opadry coating material.
Embodiment 3 Rimactazids and pyrazinamide compound capsule
1000 prescriptions:
Rifampicin 60g
Isoniazid 40g
Pyrazinamide 125g
Polyvidone 5g
Acetic acid 0.1g
Ammonium acetate 5g
Pregelatinized Starch 15g
Magnesium stearate 5g
Method for making: the polyvidone, acetic acid, the sodium acetate that take by weighing recipe quantity are dissolved in the 50ml water, make binding agent.Solid is former, adjuvant is crossed 80 eye mesh screens respectively, is taken by weighing former, adjuvant except that magnesium stearate by recipe quantity, mixing, and the binding agent wet granulation that usefulness prepares is got dried granule and 5g magnesium stearate mixing after the drying, fill No. 2 capsule.
Embodiment 4 Rimactazid compound recipe thin membrane coated tablets
1000 tablet recipes:
Rifampicin 300g
Isoniazid 150g
Polyvidone 10g
Weak ammonia is an amount of
Ammonium chloride 15g
Microcrystalline Cellulose 50g
Polyvinylpolypyrrolidone 8g
Magnesium stearate 6g
Method for making: the polyvidone, the ammonium chloride that take by weighing recipe quantity are dissolved in the 90ml water, make binder solution, and weak ammonia adjusting PH to 7.0, and is standby.Solid is former, adjuvant is crossed 80 eye mesh screens respectively, is taken by weighing Rimactazid, microcrystalline Cellulose, polyvinylpolypyrrolidone mixing by recipe quantity, with the binder solution wet granulation for preparing, get dried granule and 6g magnesium stearate mixing after the drying, tabletting, control strip focuses between 530~550mg, and plain sheet carries out film coating with the Opadry coating material.
Embodiment 5 Rimactazids, pyrazinamide compound recipe thin membrane coated tablet
1000 tablet recipes:
Rifampicin 120g
Isoniazid 80g
Pyrazinamide 250g
Polyvidone 10g
Boric acid is an amount of
Sodium tetraborate 10g
Microcrystalline Cellulose 45g
Polyvinylpolypyrrolidone 8g
Magnesium stearate 5g
Method for making: the polyvidone, sodium tetraborate that take by weighing recipe quantity are made binder solution in 50ml water, and regulate PH to 6.5 with boric acid, and be standby.Solid is former, adjuvant is crossed 80 eye mesh screens respectively, is taken by weighing Rimactazid, pyrazinamide, microcrystalline Cellulose, polyvinylpolypyrrolidone mixing by recipe quantity, with the binding agent wet granulation for preparing, get dried granule and 5g magnesium stearate mixing after the drying, tabletting, control strip focuses between 520~540mg, and plain sheet carries out film coating with the Opadry coating material.
Embodiment 6 Rimactazid compound recipe thin membrane coated tablets
1000 tablet recipes:
Rifampicin 300g
Isoniazid 150
Polyvidone 10g
Potassium Hydrogen Phthalate 12
Phthalic acid potassium sodium 13
Microcrystalline Cellulose 50g
Polyvinylpolypyrrolidone 8g
Magnesium stearate 6g
Method for making: solid is former, adjuvant is crossed 80 eye mesh screens respectively, is taken by weighing all former, auxiliary materials and mixing except that magnesium stearate by recipe quantity, dry granulation is got dried granule and 5g magnesium stearate mixing, tabletting, control strip focuses between 540~560mg, and plain sheet carries out film coating with the Opadry coating material.
Experimental example 1 adds and the medicine stability contrast test of not adding the pH regulator agent
1. test objective: investigate by accelerated test and to add the influence of pH regulator agent to drug quality stability.
2. trial drug
Test specimen: present embodiment 1 obtained tablet.
Control sample: after pH regulator agent potassium dihydrogen phosphate, dipotassium hydrogen phosphate in embodiment 1 prescription removed, make the contrast tablet by embodiment 1 method for making.
3. test method:
1) under 40 ℃, RH 75% condition, test specimen and control sample were placed 6 months,, measured the content of rifampicin and isoniazid respectively at sampling in 1,2,3,6 month, and catabolite 3-formoxyl rifamycin ftivazide content.
2) adopt high performance liquid chromatography detection of drugs and content of degradation products.Chromatographic condition is:
Chromatographic column is
250-4
PAH (Alltima Cyano100 250 * 4.6mm 5 μ m): diode array UV-detector (SPD-10A vp), detection wavelength are 254nm; 0.01mol/L (phosphoric acid,diluted is regulated pH value to 2.2)-acetonitrile (44: 56) is a mobile phase to the heptanesulfonic acid sodium solution, flow velocity 0.55ml/min.
Assay method: 10 of sample thiefs, remove film-coat, the accurate title, decide, porphyrize, precision takes by weighing fine powder an amount of (being equivalent to rifampicin 60mg approximately), puts in the 100ml measuring bottle, adds the mobile phase dissolving and is diluted to scale, shake up, filter, precision is measured subsequent filtrate 5ml, puts in the 50ml measuring bottle, be diluted to scale with mobile phase, shake up.Precision is measured 20 μ l and is injected chromatograph of liquid, the record chromatogram; Other gets rifampicin and the isoniazid reference substance is an amount of, and accurate the title decides, and dissolves also quantitatively dilution with mobile phase and makes the solution identical with need testing solution concentration, measures with method.Press external standard method with calculated by peak area main peak content, promptly.
3. experimental result
See the following form
40 ℃, RH 75% accelerated test result
4. experiment conclusion
Compare with the control sample that does not add the pH regulator agent, test specimen is at the equal good stability of each experimental stage, and the degradation material of generation is few.