PharmaceuticalandClinicalResearch2010Jun;18(3)***,210009(NO.2009zx09310-004);(No.2008BA155B03)。,,,E-mail:yuyubingcpu@hotmail.com,,,,E-mail:jiashengtu@yahoo.com.cn2010-03-012010-03-14,,,,,。,。t1/2,t1/2α2.5~3h,t1/2β5h,[1,2],。,,,[3]。24h[4]。24h。,24h;,,24h。,。11.1(Nifedipine,NF,);MCCPH101、PVPK30();EC45cps、E-7-19040(SLS,Colorcon);();();SLS();()。1.2ZRS-4();752N();();mini-GLATT(GLATT);(DSC600,Linkam,);();()。22.1NF2.1.1NF-PVPK30NFPVPK30(1∶2、1∶3、1∶5,w/w),:(1∶1,v/v),60℃,,,12h,60℃12h。,80,。::24。:E-7-19040。P=|P2h-20%|+|P12h-60%|+|P24h-100%|。:24。:。TQ460.6;R944.9A1673-7806(2010)03-235-04***2351,5min1∶2~1∶5NF-PVPK3011.19,14.0614.42,,,。1∶3,。1∶3,,,。2.1.2DSCNFNF、NF-PVPK30(NF∶PVPK30=1∶3,w/w)DSC,:,10mg,10℃·min-1,30~200℃,。2,NF176℃,NF-PVPK30176℃,NF-PVPK30(1∶3,w/w)176℃,NF,。2.1.3NF80NF-PVPK30(1∶3,w/w)(MCC、EC),,(0.9mm),25r·min-1;1200r·min-1,7.5min,。75℃,20~30。2.1.4NF:PVPK30,PVPK30,NF,,。,20%。MCC:MCC,。MCC,MCC40%,MCC[5]。EC:EC(1∶1,2∶1,1∶2,w/w)。3。,,,EC1∶1,24h,。,,EC1∶2,80℃,。EC1∶1。2.2NF2.2.1NFNFPVPK30(1∶1、1∶2、1∶3,w/w)∶=8∶1,,20min。,。35KPa,45KPa,45℃,0.2mL·min-1。(NF∶PVPK301∶1、1∶2、1∶3,w/w),0.5%SLS4。,。1∶2,60min95%,。(1∶3)1PVPK300.25%SLS2NF(a),(b)NF:PVPK30(1∶3,w/w)(c)DSC3ECNF4NFPVPK30236PharmaceuticalandClinicalResearch2010Jun;18(3),PVPK30,NFPVPK301∶2。2.2.220~3020g,,Surelease,EC8%,。35KPa,45KPa,42℃,0.3mL·min-1,。2.2.3NF,,(EC20%),5%、7.5%10%,。5。5,,,,7.5%,24h。2.3,NF,,6。,3,。《》[6],,P=|P2h-20%|+|P12h-60%|+|P24h-100%|,P,。P0.3570.142,。2.4,1。:r1,,Hixson-CrowellBaker-Lonsdale,NF,。:Hixson-Crowell,;Ritger-Peppas,Ritger-Peppas,n=0.634,0.43n0.85,Ritger-Peppas[7],non-Fickian,。HiguchiBaker-Lonsdale,。2.5《》2005(),:900mL0.5%SLS,(37±0.5)℃,100r·min-1。(NF30mg),,10mL(),0.8μm,,333nm,NF。33.1NF5NF6(A)(B)AB1NFrZero-orderQ=0.031t+0.2970.9455First-orderln(1-Q)=-0.117t+0.1220.9990Hixson-Crowell(1-Q)1/3=0.920-0.024t0.9935HiguchiQ=0.195t1/2+0.0540.9884Baker-Lonsdale3/2[1-(1-Q)2/3]-Q=0.024t-0.0800.9990Ritger-PeppasQ=0.217t0.4950.9884Zero-orderQ=0.035t+0.1620.9793First-orderln(1-Q)=-0.104t+0.0460.9930Hixson-Crowell(1-Q)1/3=0.976-0.023t0.9995HiguchiQ=0.212t1/2-0.0930.9980Baker-Lonsdale3/2[1-(1-Q)2/3]-Q=0.013t-0.0290.9980Ritger-PeppasQ=0.130t0.6340.9980237PreparationandComparisonofTwoTypesofNifedipineSustained-ReleasePelletsYUYu-bing,TUJia-shengDepartmentofPharmaceutics,ChinaPharmaceuticalUniversity,Nanjing210009,ChinaABSTRACTObjective:ToprepareNifedipinematrixandcoatedsustained-releasepellets,comparetheirreleaseprofileandmechanism.Methods:Nifedipinematrixsustained-releasepelletswerepreparedbyex-trusion-spheronisationmethodusingethylcelluloseandstearicacidasmatrixmaterial,andnifedipinecoatedsustained-releasepelletswerepreparedinafluidizedbedcoatingsystem,usingSurelease-7-19040Rascoatedmaterial.Simulatedequationandrelativecoefficientwerecalculatedandcomparedafterdataofdrugreleasewereinput.ComprehensivescoreP=|P2h-20%|+|P12h-60%|+|P24h-100%|wasusedtocomparethereleaseprofileoftwotypesofpellets.Result:Boththetwotypesofpreparedpelletshadsignificanteffectofsus-tained-releasing.Drugreleasefromthetwotypesofpelletswascontrolledbybothdiffusionandmatrixcorrosion.Conclusion:Thereleaseprofileofnifedipinecoatedsustained-releasepelletswassuperiortonifedipinematrixsustained-releasepellets.Butthepreparationofnifedipinematrixsustained-releasepelletswasmoreapplicablethancoatedsustained-releasepellets.KEYWORDSNifedipine;Sustained-releasepellets;Extrusion-spheronisation;Fluidizedbedcoating;Soliddispersions24h,。,。,,。3.2MCC,,,,,;,[5],MCC40%。EC,。:MCC,,,,。3.3,NF24h,。PVPK30NF,,。NF,。,[8]。,,,。,,,,,,。[1]FosterTS,HamannSR,RichardsVR,etal.Nifedipinekineticsandbioavailabilityaftersingleintravenousandoraldosesinnormalsubjects[J].JClinPharmacol,1983,23(4):161-70.[2]RaemschKD,SommerJ.Pharmacokineticsandmetabolismofnifedipine[J].Hypertension,1983,5(4Pt2):II18-24.[3],,,.[J].,2001,10(5):44-5.[4].[J].,1999,18(3):190.[5]VarshosazJ,KennedyRA,GippsEM.Effectofbinderlevelandgranulatingliquidonphenylbutazonepelletspreparedbyextrusion-spheronization[J].DrugDevIndPharm,1997,23(7):611-8.[6].[S].,:,2005:179-80.[7]RitgerPL,PeppasNA.AsimpleequationfordescriptionofsolutereleaseI.Fickianandnon-fickianreleasefromnon-swellabledevicesintheformofslabs,spheres,cylindersordiscs[J].JControlRelease,1987,5(1):23-6.[8],,,.[J].,2009,32(2):128-31.238