KR102593114B1 - 약물 봉입률과 지속방출능력이 향상된 미립구 및 이의 제조방법 - Google Patents
약물 봉입률과 지속방출능력이 향상된 미립구 및 이의 제조방법 Download PDFInfo
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- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K9/00—Medicinal preparations characterised by special physical form
- A61K9/14—Particulate form, e.g. powders, Processes for size reducing of pure drugs or the resulting products, Pure drug nanoparticles
- A61K9/16—Agglomerates; Granulates; Microbeadlets ; Microspheres; Pellets; Solid products obtained by spray drying, spray freeze drying, spray congealing,(multiple) emulsion solvent evaporation or extraction
- A61K9/1605—Excipients; Inactive ingredients
- A61K9/1629—Organic macromolecular compounds
- A61K9/1641—Organic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polyethylene glycol, poloxamers
- A61K9/1647—Polyesters, e.g. poly(lactide-co-glycolide)
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Abstract
Description
도 2는 메만틴 파모메이트 염과 메만틴 파모에이트 염이 봉입된 미립구의 메만틴 초기 방출율을 평가한 실험결과를 나타낸 것이다.
Claims (11)
- 메만틴 파모에이트 염(memantine pamoate salt)을 10 내지 40중량%로 포함하며, 생체적합성 고분자 60 내지 90중량%를 포함하며,
상기 생체적합성 고분자는 폴리락트산, 폴리락타이드, 폴리락틱-코-글리콜산, 폴리락타이드-코-글리콜라이드(PLGA), 및 이들의 혼합물로 이루어진 군에서 선택되며,
상기 생체적합성 고분자는 0.1 내지 1.9dL/g의 고유점도를 가지며,
상기 메만틴 파모에이트 염이 24시간 이내에 20중량% 이하로 방출이 되고, 나머지가 14일 내지 35일까지 지속적으로 방출되며, 용출률이 80중량% 이상인 미립구.
- 삭제
- 삭제
- 삭제
- 제1항에 있어서, 상기 미립구는 생체적합성 고분자, 메만틴 파모에이트 염 및 분산용매를 포함하는 O/W (oil-in-water)형 용매증발법 또는 용매추출법에 따라 제조된 것을 특징으로 하는 미립구.
- (a) 메만틴 파모에이트 염 및 생체적합성 고분자를 1종 이상의 용매를 이용하여 분산상을 제조하는 단계;
(b) 상기 제조된 분산상을 연속상에 넣고 교반하여 미립구를 형성시키는 단계; 및
(c) 상기 용매를 제거하는 단계를 포함하며,
상기 (a) 단계에서 메만틴 파모에이트 염은 상기 생체적합성 고분자 100중량부에 대하여 25 내지 100중량부로 분산되거나 용해되는 것을 특징으로 하는, 제1항에 따른 미립구의 제조방법.
- 삭제
- 제6항에 있어서, 상기 (c) 단계 이후에 수득된 미립구를 세척하는 단계를 추가로 포함하는 것을 특징으로 하는 제조방법.
- 제6항에 있어서, 상기 제조방법에 따라 수득된 미립구에 봉입된 메만틴 파모에이트 염의 중량은 상기 (a) 단계에서 용해시킨 메만틴 파모에이트 염의 중량 대비 50% 이상인 것을 특징으로 하는 제조방법.
- 제1항 및 제5항 중 어느 한 항에 따른 미립구를 포함하는 중추신경계 질환 예방 또는 치료용 약학적 조성물.
- 제10항에 있어서, 상기 조성물은 주사용인 것을 특징으로 하는 약학적 조성물.
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