Abstract:
:The optimized formulation of N-4472, N-[2-(3,5-di-tert-butyl-4-hydroxyphenethyl)-4,6-difluorophenyl]-N'-[4-(N-benzylpiperidyl)] urea, which was a poorly water-soluble drug, was developed by utilizing the complexation between N-4472 and L-ascorbic acid (VC). It was found that the formulation with Gelucire((R)) 44/14, HCO-60((R)) and sodium dodecyl sulfate provided a self-microemulsifying system consisting of fine droplets in approximately 18 nm size with a narrow distribution. 1H-NMR spectroscopic study indicated that the N-4472/VC complex was molecularly incorporated into surfactant molecular assembly in the microemulsion droplets. It was found that the N-4472 microemulsion was stable at the pH range from 2.0 to 7.0, suggesting the stability in the gastrointestinal tract. When the microemulsion containing N-4472/VC complex was orally administrated in rats, high AUC value of N-4472 (2 to 4-fold) was observed in comparison with the aqueous solution containing N-4472/VC complex.
journal_name
Int J Pharmjournal_title
International journal of pharmaceuticsauthors
Itoh K,Matsui S,Tozuka Y,Oguchi T,Yamamoto Kdoi
10.1016/s0378-5173(02)00346-0keywords:
subject
Has Abstractpub_date
2002-10-10 00:00:00pages
75-83issue
1-2eissn
0378-5173issn
1873-3476pii
S0378517302003460journal_volume
246pub_type
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