NO312433B1 - Fremgangsmåte for oppnåelse av en stabil krystallinsk form av et finkornet stoff i uagglomerert form, og preparat - Google Patents
Fremgangsmåte for oppnåelse av en stabil krystallinsk form av et finkornet stoff i uagglomerert form, og preparat Download PDFInfo
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- NO312433B1 NO312433B1 NO19960744A NO960744A NO312433B1 NO 312433 B1 NO312433 B1 NO 312433B1 NO 19960744 A NO19960744 A NO 19960744A NO 960744 A NO960744 A NO 960744A NO 312433 B1 NO312433 B1 NO 312433B1
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- Norway
- Prior art keywords
- substance
- lactose
- fine
- additive
- mixture
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- C07C65/40—Compounds having carboxyl groups bound to carbon atoms of six—membered aromatic rings and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups containing keto groups containing singly bound oxygen-containing groups
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- Air Conditioning Control Device (AREA)
Description
Foreliggende oppfinnelse vedrører en fremgangsmåte for oppnåelse av en stabil krystallinsk form av et finkornet stoff i uagglomerert form. Den oppnådde krystallinske formen kan produseres, lagres og anvendes under opprettholdelse av de aerodynamiske egenskapene som er nødvendig for inhalering av en slik form og den har forbedrede fysikalsk-kjemiske egenskaper i tørr tilstand hvilket letter den tekniske håndtering og i betydelig grad øker den medisinske verdi av den benyttede formulering. Oppfinnelsen angår også et preparat.
Det er for tiden flere effektive legemidler tilgjengelig for behandling av pasienter med astma eller andre respiratoriske sykdommer. Det har blitt erkjent at disse legemidlene der det er mulig bør gis ved inhalering. Det ideelle avleveringssystemet for inhalerbare legemidler ville være en bruker- og miljøvennlig flerdoseinhalator som gir nøyaktige doser av en stabil formulering med god aerodynamisk partikkelyteevne.
I løpet av de siste år som er gått har det ofte fremkommet bevis på det faktum at det hensiktsmessige valg av den mest egnede krystallinske modifikasjon i betydelig grad kan innvirke på de kliniske resultatene for et gitt kjemisk stoff. Den kjemiske og fysikalske stabiliteten til et fast stoff i en spesiell doseringsform kan forbedres ved å presen-tere stoffet (stoffene) i den formålstjenelige krystallformen. Fastfaseomdannelsen av stoffet i en doseringsform kan på dramatisk måte endre formuleringens farmasøytiske egenskaper. Den faste fasen til det administrerte stoffet (-stoffene) kan innvirke på slike viktige faktorer som biotilgjengelighet og fysikalsk-kjemisk stabilitet (spesifikt over-flateareal, partikkelstørrelse osv). Kjemisk stabilitet i fast tilstand og hygroskopisitet er ofte nær beslektet med krystalliniteten.
Faststoffomdannelser kan oppstå under mekanisk bearbeidelse, f. eks mikronisering. I en mikromseringsprosess leder oppbryting eller aktivering av den krystallinske strukturen ofte til varierende grader av forstyrrelser gjennom dannelsen av defekter eller amorfe områder. Slike områder er ofte følsomme overfor eksterne effekter, f.eks fuktighet. Det er nødvendig å etablere de betingelser hvorved forskjellige former for et stoff vil kunne omdannes til en enkelt stabil form og dermed eliminere forskjeller i egenskaper for faststofftilstand og etterfølgende forskjellige fysikalsk-kjemiske og farmasøytiske egenskaper.
Den økende produksjon og bruk av fine pulvere i den farmasøytiske industrien har frem-hevet behovet for pålitelige metoder for bestemmelse av deres fysikalsk-kjemiske og tekniske håndtering. Blanding av kohesive pulvere vil bli påvirket av de interpartikulære kreftene mellom partikler av samme forbindelse og også mellom partikler av forskjellige forbindelser. Siden fine pulvere agglomererer vil blandingen ofte være inhomo-gen, spesielt vil en underordnet komponent vise en skjev fordeling. En grunn kan være at agglomeratene av den underordnede komponenten ikke er fullstendig dispergert i deres komponentpartikler; se videre Chem. Eng. (1973), 12-19. Kohesive pulvere er således meget vanskelig å blande til en homogen blanding på en nøyaktig måte, spesielt når en komponent kun er tilstede som en liten fraksjon.
Stoffer vil ofte oppnås i en amorf tilstand og/eller en metastabil krystallinsk form ved spraytørking, frystetørking, bråtilsetning av oppløsningsmiddel eller ved bruk av kontrollert utfelling. Anvendelsen av en amorf form eller metastabil krystallinsk form er ofte begrenset på grunn av dens termodynamiske instabilitet. Det er derfor et ønske å omdanne den amorfe formen eller den metastabile krystallinske formen til en mer stabil krystallinsk tilstand. For krystallinske stoffer vil et operasjonstrinn med findeling gi amorfe områder i partikkelen hvilket gjør partikkelen mer følsom overfor fuktighet og kjemisk nedbrytning. Foreliggende oppfinnelse angår slike fysikalske endringer, eller mer viktig, hvordan forutse dem, og metoder ved hjelp av hvilke disse faststoff-fenomenene kan håndteres.
Forandringen eller kondisjoneringen av et vannoppløselig stoff, amoft eller delvis amorft, ved bruk av et oppløsningsmiddel slik som etanol, aceton eller lignende, har blitt beskrevet i EP-patentsøknad 508 969 der enkeltforbindelser har blitt behandlet. Denne fremgangsmåten er imidlertid ikke anvendbar for noen stoffer som inneholder krystallvann fordi organiske oppløsningsmidler vil eliminere vannet og dermed betydelig endre stoffets egenskaper. Det har vært forstått at vannoppløselige stoffer ikke kan kondisjoneres med vann mens partikkelfordelingen av et finkornet stoff holdes intakt.
Referanser:
Amorphous-to-Crystalline Transformation of Sucrose, Phar. Res. 7(12), 1278 (1990) av J.T. Carstensen og K. Van Scoik.
Effect of Surface Characteristics of Theophylline Anhydrate Powder on Hygroscopic Stability, J. Pharm. Pharmacol. 42, 606 (1990) av M. Otsuka et al.
Process for conditioning of water-soluble substances, EP-patentsøknad 508969 av J. Trofast et al.
The molecular basis of moisture effect on the physica and chemical stability of drugs in the solid state, Int. J. Pharm. 62 (1990), 87-95 av C. Ahlneck og G. Zografi.
Formålet med foreliggende oppfinnelse er å tilveiebringe en fremgangsmåte for oppnåelse av en stabil krystallinsk form av et finkornet stoff eller stoffblanding, hvilken form kan produseres, lagres og anvendes under opprettholdelse av de aerodynamiske egenskapene som er nødvendig for inhalering av en slik krystallinsk form. Det finkornede stoffet eller stoffblandingen kondisjoneres i en styrt prosess for derved å lette den tekniske håndteringen og i betydelig grad øke den medisinske verdien av den benyttede formulering.
Ifølge oppfinnelsen er det således tilveiebragt en fremgangsmåte for oppnåelse av en stabil krystallinsk form av et finkornet stoff i uagglomerert form, hvor stoffet har en partikkelstørrelse mindre enn 10 um, og denne fremgangsmåten er kjennetegnet ved a) redusering av stoffpartiklene til mindre enn 10 nm;
b) kondisjonering av stoffet med vanndamp på en regulert måte; og deretter
c) tørking av det kondisjonerte stoffet og isolering av de resulterende partiklene av en
størrelse mindre enn 10 um.
Foretrukne og fordelaktige trekk ved denne fremgangsmåten fremgår fra de medfølgende krav 2-17.
Det skal forstås at når betegnelsen "finkornet stoff er benyttet så skal denne innbefatte enkeltstoffer samt stoffblandinger.
Foreliggende fremgangsmåte kan i en utførelse innbefatte følgende trinn:
a) i tilfelle for en stoffblanding, fremstilling av en homogen blanding av stoffene; b) mikronisering (dvs partikkelstørrelsesredusering), direkte utfelling eller forminsking ved hjelp av en hvilken som helst konvensjonell metode, av stoffet eller stoffblandingen til en partikkelstørrelse som er nødvendig for inhalering, idet partikkelstørrelsen er mindre enn 10 um; c) eventuell fremstilling av en homogen blanding av de ønskede stoffene når hvert stoff har blitt introdusert fra trinn b) som separate finkornede partikler; d) kondisjonering av nevnte stoff eller stoffblanding ved behandling med en vannholdig dampfase på en regulert måte; og e) tørking av det kondisjonerte stoffet og isolering av de resulterende partiklene av en størrelse på mindre enn 10 um.
Kondisjoneirngstrinnet utføres ved behandling med en vannholdig dampfase. Den vann-holdige dampfasen er en vanndampfase med eller uten noen tilstedeværende organisk oppløsningsmiddeldamp.
Kondisjoneirngstrinnet utføres ved en kombinasjon av temperatur/relativ fuktighet som undertrykker glasstemperaturen til stoffer som er involvert under prosesstemperaturen. Glasstemperaturen (Tg) er den temperaturen ved hvilken mobiliteten til et amorft materiale gjennomgår endringer fra en immobil glassaktig tilstand til mobil gummiaktig tilstand (faseovergang). Kondisjoneringen utføres vanligvis ved en temperatur mellom 0 og 100°C, fortrinnsvis mellom 10 og 50°C. Av praktiske grunner blir kondisjoneringen ofte utført ved omgivelsestemperatur. Den relative fuktigheten (RH) ved hvilken kondisjoneringen utføres velges slik at faseovergangen inntreffer, hovedsakelig over 35 % RH, fortrinnsvis over 50 % RH, og mest foretrukket over 75 % RH. Tiden som anvendes påvirkes i betydelig grad av satsens størrelse, den relative fuktigheten og pakkingen osv og kan være fra minutter til dager.
Formuleringen kan innbefatte f.eks et stoff som forsterker absorbsjonen av et farmakologisk aktivt legemiddel i lungen. Forsterkerene som kan benyttes kan være en hvilken som helst av en rekke forbindelser som virker slik at de forbedrer absorbsjon gjennom laget av epitelceller som bekler alveolene i lungen og inn i den tilstøtende pulmonare vaskulatur. Blant stoffene med kjente absorbsjonsforbedrende egenskaper er overflateaktive midler slik som alkalisalter av fettsyrer, natriumtaurodihydrofusidat, lecithiner, natriumglykokolat, natriumtaurokolat, oktylglukopyranosid og lignende.
Andre additiver kan være bærere, fortynningsmidler, antioksydasjonsmidler, buffersalter og lignende, som alle kan bli behandlet ifølge foreliggende fremgangsmåte.
Nøyaktigheten og reproduserbarheten av doser er ofte ikke tilstrekkelig ved bruk av meget små doser i en inhaleringsanordning. Meget potente legemidler kan derfor for-tynnes med en bærer for å oppnå en mengde pulver som er tilstrekkelig til å oppnå en pålitelig og reproduserbar dose. En slik bærer kan være karbohydrater slik som laktose, glukose, fruktose, galaktose, trehalose, sukrose, maltose, raffinose, maltitol, melezitose, stivelse, xylitol, mannitol, myoinositol og lignende eller et hydrat av hvilken som helst én derav (fortrinnsvis laktose og mannitol) og aminosyrer slik som alanin, betain og lignende.
Grovere partikler med en størrelse over 10 um kan også kondisjoneres ved bruk av foreliggende fremgangsmåte.
Foreliggende oppfinnelse kan benyttes på f.eks følgende farmakologisk aktive stoffer: Formoterol (f.eks som fumarat) og salmeterol (f.eks som xinafoat) er meget selektive, lengevarende B2-adrenergiske agonister som har bronkospasmolytisk effekt og er effektive i behandlingen av reversible obstruktive lungelidelser av forskjellig opp-rinnelse, spesielt astmatiske tilstander. Salbutamol (f.eks som sulfat), bambuterol (f.eks som hydroklorid), terbutalin (f.eks som sulfat), fenoterol (f.eks som hydrobromid), klenbuterol (f.eks som hydroklorid), prokaterol (f.eks som hydroklorid), bitolterol (f.eks som mesylat) og broksaterol er meget selektive 62-adrenergiske agonister og ipratropiumbromid er en antikolinergisk bronkodilater. Eksempler på antiinflammatoriske gluko-kortikoider er budenosid, (22R)-6a,9oc-difluor-l 16,21-dihydroksy-16a, 17a-propyl-metylendioksy-4-pregnen-3,20-dion, flutikason (f.eks som propionatester), beklometa-son (f.eks som dipropionatester), tipredan, mometason og lignende. Flere av forbind-elsene kan være i form av farmakologisk akseptable estere, salter, solvater, slik som hydrater, eller solvater slik som estere eller salter, dersom slike forekommer.
De foretrukne stoffene på hvilke oppfinnelsen skal benyttes er terbutalinsulfat, salbutamolsulfat, fenoterolhydrobromid, ipratropiumbromid, bambuterolhydroklorid, formoterolfumarat og salmeterolxinafoat, og deres solvater, spesielt deres hydrater.
Den mest foretrukne stoffblandingen på hvilken oppfinnelsen skal anvendes er formoterol (som formoterolfumaratdihydratyiaktose (monohydrat), skjønt det samme prinsippet kan anvendes på kombinasjoner slik som salbutamol (som salbutamolsulfat)/ laktose, terbutalin (som terbutalinsulfat)/laktose, ipratropiumbromid/laktose, budesonid/ laktose, (22R)-6a,9a-difluor-116,21 -dihydroksy-16a, 17a-propylmetylendioksy-4-pregnen-3,20-dion/mannitol, (22R)-6a,9a-difluor-116,21 -dihydroksy-16a, 17a-propyl-metylendioksy-4-pregnen-3,20-dion/myoinositol og (22R)-6a,9a-difluor-l 16,21-dihydroksy-16a,17a-propylmetylendioksy-4-pregnen-3,20-dion/laktose. Når en av komponentene er temmelig uoppløselig i vann er det mulig å benytte et organisk opp-løsningsmiddel som et kondisjoneringsmiddel for en forbindelse og vanndamp som et kondisjoneirngsmiddel for den andre i kondisjoneringstrinnet. I dette tilfelle kan kondisjoneringen utføres i en totrinnsprosedyre hvor det første trinnet er kondisjonering med et organisk oppløsningsmiddel fulgt av kondisjonering med vanndamp i et annet trinn; eller vice versa.
Forandringen eller kondisjoneringen av stoffet eller stoffblandingen, amorf eller delvis amorf, innebærer behandling av stoffet (stoffene) med en vannholdig dampfase på en regulert måte. Dette kondisjoneirnstrinnet vil bli utført i et definert miljø med regulert og justerbar fuktighet f.eks en kolonne ved bruk av inert gass og/eller organisk opp-løsningsmiddeldamp inneholdende den nødvendige mengde vanndamp. Pakkingen av stoffet eller stoffblandingen påvirker den tid som skal til samt kondisjoneringens resultat. Tilbøyeligheten til kakedannelse påvirker antallet og størrelsen av partikler. I tilfelle for en stoffblanding er det vanligvis en fordel å blande stoffene før mikroni-seringstrinnet for å sikre en homogen blanding ved anvendelse av små forhold mellom legemiddelstoffet og additivet.
Med foreliggende oppfinnelse er det mulig å kondisjonere to eller flere stoffer i den samme prosessen mens partikkelfordelingen opprettholdes og dette er en stor fordel fra et teknisk synspunkt.
Forholdet mellom stoffene i en stoffblanding er mellom 1:1 og 1:1000, fortrinnsvis mellom 1:1 og 1:500, og mest foretrukket mellom 1:1 og 1:200 i det tilfelle hvor et stoff er et farmakologisk aktivt stoff og det andre er et additiv.
Partikkelstørrelsen til de finkornede stoffene bør være identisk før og etter kondisjoneringstrinnet målt ved hjelp av forskjellige instrumenter slik som Mal vern Master Sizer, Coulter Counter eller et mikroskop.
Det er også av største betydning at partiklene som oppnås i krystallinsk form er veldefinerte når det gjelder størrelse og fordeling samt at de har små sats-til-sats variasjoner for å oppnå agglomerater som vil desintegrere fullstendig i deres primærpartikler i den benyttede inhalatoren.
Det er et formål med foreliggende oppfinnelse å tilveiebringe en pålitelig fremgangsmåte hvor legemiddelformuleringen av et enkelt legemiddelstoff eller en kombinasjon av et legemiddelstoff/additiv, fortrinnsvis forrnoterolfumaratdihydrat/laktose, kan frem-stilles på hensiktsmessig måte og reproduserbart.
For noen materialer slik som formoterol/laktose, hvor Tg (glassovergangstemperaturen, den temperatur ved hvilken mobiliteten til et amorft stoff gjennomgår endringer fra en immobil glassaktig tilstand til mobil gummiaktig tilstand) eller vannfølsomhet er markert forskjellig for legemiddelstoffet og additivet, kan fremgangsmåten utføres i to konsekutive trinn, dvs kondisjonering av et stoff ved en temperatur/RH-kombinasjon fulgt av kondisjonering ved en høyere temperatur/RH for det andre stoffet.
Blandingstrinnet utføres fortrinnsvis før mikromserings- eller partikkelreduserings-trinnet (i) for å sikre at innholdet blir ensartet eller i et enkelt trinn ved bruk av en vibrasjonskulemølle som rapportert av I. Krycer og J.A. Hersey i Int. J. Pharm. 6,119-129 (1980). Det er også mulig å blande stoffene etter mikronisering eller etter at hvert stoff har blitt kondisjonert.
I noen tilfeller har det vært mulig å benytte infrarød spektroskopi for å studere om-dannelsen av en amorf form eller en delvis krystallinsk form til en stabil krystallinsk form. Andre metoder som er tilgjenglig inkluderer BET-gassadsorbsjon, røntgen-pulverdiffraksjon, isoterm mikrokalorimetri og differensial scanningkalorimetri (DSC). Man har funnet at BET-gassadsorbsjon og isoterm mikrokalorimetri er de beste metodene for så skjelne mellom de forskjellige formene for testede forbindelser.
Når et stoff eller stoffblanding er agglomerert og benyttes som sådan, finner man en nedgang på ca 70-80 % av de respirerbare partiklene ved eksponering overfor høy fuktighet. Det har forbausende nok blitt funnet at en nedgang på kun ca 25-30 % inntreffer når et stoff eller stoffblanding har blitt kondisjonert (ved 50 % RH for formoterolfumaratdihydrat/laktose-blanding) før agglomerering og eksponering overfor høy fuktighet. Etter ytterligere kondisjonering ved 75 % RH vil en nedgang på kun 5-10 % av de respirerbare partiklene forekomme. Det er ingen forskjell i partikkelfordeling målt med et Malvern-instrument før og etter kondisjonering ved 75 % RH. Dersom kondisjoneringen utføres med det agglomererte produktet blir partikkelfordelingen betydelig verre og formuleringen ubrukelig i en inhaleringsanordning.
Ifølge oppfinnelsen er det også tilveiebragt et preparat som er kjennetegnet ved at det innbefatter mikronisert ipratropioumbromid eller formoterolfumaratdihydrat, hvor hvilke som helst av disse kan befinne seg i blanding med laktose, hvilken forbindelse eller blanding ved utsettelse for en vannholdig dampfase frigjør varme av mindre enn 0. 5 J/g.
Foretrukne trekk ved dette preparatet fremgår fra de medfølgende krav 19 og 20.
Eksperimentell prosedyre
1. Blanding av legemiddelstoffet eller additivet, eller en blanding derav i et definert forhold.
2. Mikronisering av blandingen.
3. Kondisjonering ved en kombinasjon av temperatur/relativ fuktighet som undertrykker glasstemperaturen til involverte stoffer undre prosesstemperaturen. Glasstemperaturen (Tg) er den temperatur ved hvilken mobiliteten til et amorft materiale gjennomgår endringer fra en immobil glassaktig tilstand til mobil gummiaktig tilstand.
4. Tørking med tørr nitrogen eller luft, eller i vakuum.
EKSEMPLER
Oppfinnelsen illustreres ytterligere av følgende eksemper utført i overensstemmelse med den beskrevne eksperimentelle prosedyre. Flere porsjoner av hvert stoff eller stoffblanding har blitt målt. Dataene representerer en sammenligning av den varme (J/g) som avgis av ikke-kondisjonerte og kondisjonerte stoffer når de utsettes for en vannholdig dampfase. Forsøkene utføres ved bruk av en Thermal Activity Monitor 2277 (Thermo-metrics AB, Sverige)
Eksempel 1
Salbutamolsulfat (25 %)/laktose (75 %)
Eksempel 2
Ipratropiumbromid (6 %)/laktose (94 %)
Eksempel 3 Formoterolfumaratdihydrat
Eksempel 4
Laktose (se figur 1)
Eksempel 5 Melezitose
Eksempel 6
Formoterolfumaratdihydrat (2 %)/laktose (98 %)
Under en omkrystallisering utvikles en stor mengde varme, og ved å overvåke det kalorimetriske signalet kontrolleres prøven med henblikk på eventuelt amorft innhold.
Figur 1 viser mikronisert laktose før (I) og etter (II) kondisjonering. En fullstendig krystallinitet har således blitt oppnådd under kondisjoneringen ifølge oppfinnelsen.
Claims (20)
1.
Fremgangsmåte for oppnåelse av en stabil krystallinsk form av et finkornet stoff i uagglomerert form, hvor stoffet har en partikkelstørrelse mindre enn 10 um, karakterisert veda) redusering av stoffpartiklene til mindre enn 10 um; b) kondisjonering av stoffet med vanndamp på en regulert måte; og deretter c) tørking av det kondisjonerte stoffet og isolering av de resulterende partiklene av en størrelse mindre enn 10 um.
2.
Fremgangsmåte ifølge krav 1, karakterisert ved at det finkornede stoffet er i blanding med et annet finkornet stoff.
3.
Fremgangsmåte ifølge krav 1 eller 2, karakterisert ved at trinn b) utføres i en entrinnsprosedyre eller i en flertrinnsprosedyre ved bruk av forskjellige kombinasjoner av relativ fukighet/temperatur.
4.
Fremgangsmåte ifølge hvilket som helst av de foregående krav, karakterisert ved at stoffet er et enkelt legemiddelsto ff eller en kombinasjon av et legemiddelstoff og et additiv.
5.
Fremgangsmåte ifølge hvilket som helst av de foregående krav, karakterisert ved at stoffet velges fra gruppen bestående av formoterol, salmeterol, salbutamol, bambuterol, terbutalin, fenoterol, klenbuterol, prokaterol, bitolterol, broksaterol, ipratropiumbromid, budenosid, (22R)-6oc,9a-difluor-116,21-dihydroksy-16a, 17a-propylmetylendioksy-4-pregnen-3,20-dion, flutikason, beklo-metason, tipredan, mometason, og farmakologisk akseptable estere, salter og solvater derav og et solvat av slike estere eller salter.
6.
Fremgangsmåte ifølge krav 5, karakterisert ved at stoffet velges fra gruppen bestående av formoterolfumarat, salmeterolxinafoat, salbutamolsulfat, bambuterolhydroklorid, terbutalinsulfat, fenoterolhydrobromid, klenbuterolhydroklorid, procaterolhydroklorid, bitolterolmesylat, flutikasonpropionat, beklometasondipropionat og et solvat av hvilke som helst derav.
7.
Fremgangsmåte ifølge krav 4, karakterisert ved at additivet velges fra gruppen bestående av laktose, glukose, fruktose, galaktose, trehalose, sukrose, maltose, raffinose, maltitol, melezitose, stivelse, xylitol, mannitol, myoinositol og et hydrat av hvilket som helst derav, og en aminosyre.
8.
Fremgangsmåte ifølge krav 4, karakterisert ved at additivet velges fra gruppen bestående av laktose og mannitol og et hydrat av hvilke som helst derav.
9.
Fremgangsmåte ifølge krav 4, karakterisert ved at additivet velges fra gruppen bestående av en forsterker, et antioksydasjonsmiddel og et buffersalt.
10.
Fremgangsmåte ifølge krav 9, karakterisert ved at additivet er en forsterker som velges fra gruppen bestående av et alkalisalt av en fett-syre, natriumtaurodihydrofusidat, en lecithinforbindelse, natriumglykokolat, natriumtaurokolat og oktylglukopyranosid.
11.
Fremgangsmåte ifølge hvilket som helst av kravene 1-4, karakterisert ved at stoffet er en stoffblanding som velges fra formoterol/laktose, salbutamol/laktose, budenosid/laktose, (22R)-6a,9cc-difluor-l 1B,21 -dihydroksy- 16a, 17 a-propylmetylendioksy-4-pregnen-3,20-dion/mannitol, (22R)-6a,9a-difluor-1113,21-dihydroksy-16a, 17a-propylmetylendioksy-4-pregnen-3,20-dion/laktose.
12.
Fremgangsmåte ifølge hvilket som helst av kravene 1-4, karakterisert ved at stoffet er en stoffblanding som velges fra formoterolfumaratdihydrat/laktose, salbutamolsulfat/laktose og terbutalinsulfat/laktose.
13.
Fremgangsmåte ifølge hvilket som helst av de foregående krav, karakterisert ved at trinn b) utføres ved en temepratur i området 0 - 100°C og en relativ fuktighet på ca 35 % RH.
14.
Fremgangsmåte ifølge hvilket som helst av de foregående krav, karakterisert ved at trinn b) utføres ved en temperatur mellom 10 og 50°C.
15.
Fremgangsmåte ifølge hvilket som helst av de foregående krav, karakterisert ved at trinn b) utføres ved en relativ fuktighet over 50 % RH.
16.
Fremgangsmåte ifølge krav 15, karakterisert ved at trinn b) utføres ved relativ fuktighet over 75 % RH.
17.
Fremgangsmåte ifølge krav 1, karakterisert ved at stoffet omfatter et legemiddel og et additiv i et forhold mellom 1:1 og 1:500.
18.
Preparat, karakterisert ved at det innbefatter mikronisert ipratropioumbromid eller formoterolfumaratdihydrat, hvor hvilke som helst av disse kan befinne seg i blanding med laktose, hvilken forbindelse eller blanding ved utsettelse for en vannholdig dampfase frigjør varme av mindre enn 0,5 J/g.
19.
Preparat ifølge krav 18, karakterisert ved at det innbefatter fonnoterolfumaratdihydrat.
20.
Preparat ifølge krav 19, karakterisert ved at det innbefatter formoterolfumaratdihydrat og laktose.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9302777A SE9302777D0 (sv) | 1993-08-27 | 1993-08-27 | Process for conditioning substances |
PCT/SE1994/000780 WO1995005805A1 (en) | 1993-08-27 | 1994-08-25 | Process for conditioning substances |
Publications (3)
Publication Number | Publication Date |
---|---|
NO960744L NO960744L (no) | 1996-02-23 |
NO960744D0 NO960744D0 (no) | 1996-02-23 |
NO312433B1 true NO312433B1 (no) | 2002-05-13 |
Family
ID=20390906
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO19960744A NO312433B1 (no) | 1993-08-27 | 1996-02-23 | Fremgangsmåte for oppnåelse av en stabil krystallinsk form av et finkornet stoff i uagglomerert form, og preparat |
Country Status (34)
Country | Link |
---|---|
US (2) | US5709884A (no) |
EP (1) | EP0717616B1 (no) |
JP (1) | JP2978247B2 (no) |
KR (1) | KR100348120B1 (no) |
CN (2) | CN1049333C (no) |
AT (1) | ATE199828T1 (no) |
AU (1) | AU681186B2 (no) |
BR (1) | BR9407320A (no) |
CA (1) | CA2170394C (no) |
CZ (1) | CZ289018B6 (no) |
DE (1) | DE69426934T2 (no) |
DK (1) | DK0717616T3 (no) |
EE (1) | EE03203B1 (no) |
EG (1) | EG20779A (no) |
ES (1) | ES2156158T3 (no) |
FI (1) | FI117120B (no) |
GR (1) | GR3036106T3 (no) |
HK (1) | HK1016493A1 (no) |
HU (1) | HU217770B (no) |
IL (1) | IL110698A (no) |
IS (1) | IS1691B (no) |
MY (1) | MY123675A (no) |
NO (1) | NO312433B1 (no) |
NZ (1) | NZ273090A (no) |
PH (1) | PH31549A (no) |
PL (1) | PL176749B1 (no) |
PT (1) | PT717616E (no) |
RU (1) | RU2148992C1 (no) |
SE (1) | SE9302777D0 (no) |
SG (1) | SG47760A1 (no) |
SK (1) | SK283146B6 (no) |
UA (1) | UA37240C2 (no) |
WO (1) | WO1995005805A1 (no) |
ZA (1) | ZA945675B (no) |
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