Abstract：
:The aim of this study was to examine the diffusion of commonly administered analgesics, ibuprofen and paracetamol, through gastric mucus. As ibuprofen and paracetamol are often formulated with alkalising excipients, or are commonly co-administered with antacids that have been demonstrated to alter their absorption, diffusion was also studied in the presence of a range of soluble and insoluble antacids or buffering agents. The effect of pH, which has been demonstrated to modify the properties of mucus, was also studied. Mucus was a significant barrier to diffusion for both drugs, compared to an unstirred aqueous layer with diffusion rates significantly lower in the presence of a mucus barrier for both drugs; ibuprofen diffusion also demonstrated a significant increase in the lag time. Paracetamol diffusion was not significantly affected by addition of any antacid, whereas ibuprofen rates were affected and the diffusion lag time for ibuprofen was significantly reduced in all cases. Isolated increases in pH increased the rate and reduced the lag time for ibuprofen diffusion. It was shown that mucus acts as a passive barrier in the case of paracetamol diffusion, and an interactive barrier to ibuprofen diffusion. Changes in mucus viscosity at different pH values may be responsible for the observed changes in ibuprofen diffusion rate.
journal_name
Int J Pharmjournal_title
International journal of pharmaceuticsauthors
Shaw LR,Irwin WJ,Grattan TJ,Conway BRdoi
10.1016/j.ijpharm.2004.11.028keywords:
subject
Has Abstractpub_date
2005-02-16 00:00:00pages
145-54issue
1-2eissn
0378-5173issn
1873-3476pii
S0378-5173(04)00708-2journal_volume
290pub_type
杂志文章abstract：:Danshen (Salvia miltiorrhiza) contains tanshinones, which inhibit P-glycoprotein (P-gp) and the cytochrome P450 (CYP) system. In the present study, we evaluated the possible pharmacokinetic interactions of Danshen extract with docetaxel and clopidogrel in rats. Docetaxel (5 mg/kg intravenously and 40 mg/kg orally) or ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
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abstract：:The purpose of this study was to construct microemulsion-base hydrogel formulation for topical delivery of ibuprofen. Ethyl oleate (EO) was screened as the oil phase of microemulsions, due to a good solubilizing capacity of the microemulison systems and excellent skin permeation rate of ibuprofen. The pseudo-ternary p...
journal_title：International journal of pharmaceutics
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abstract：:This work presents a simple and fast method for the simultaneous determination of amiloride and furosemide by digital derivative spectrophotometry. HCl 1 x 10(-2) mol/l dissolved in ethanol was used as solvent and to extract drugs from formulations. Subsequently the samples were evaluated directly by first digital der...
journal_title：International journal of pharmaceutics
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abstract：:Glioblastoma (GBM) is a difficult-to-treat cancer, likely attributed to the blood brain barrier and drug resistance. Nose-to-brain drug delivery is a direct and non-invasive pathway for brain targeting with low systemic toxicity. Disulfiram (DSF) has shown its effectiveness against GBM, especially with copper ion (Cu)...
journal_title：International journal of pharmaceutics
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abstract：:The aim of the present study was to investigate the relationship between formulation/process variables versus the critical quality attributes (CQAs) of cyclosporine ophthalmic ointments and to explore the feasibility of using an in vitro approach to assess product sameness. A definitive screening design (DSD) was used...
journal_title：International journal of pharmaceutics
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abstract：:The development over the past decade of design strategies for cocrystal preparation have led to numerous methods for the synthesis of cocrystal without take care of their influence on the precise structure and stability of cocrystalline states. On the other hand the mechanism of cocrystal formation remains widely uncl...
journal_title：International journal of pharmaceutics
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abstract：:The purpose of this study was to evaluate a single-step, organic solvent-free supercritical fluid process for the preparation of olanzapine-methyl-β-cyclodextrin complexes with an express goal to enhance the dissolution properties of olanzapine. The complexes were prepared by supercritical carbon dioxide processing, c...
journal_title：International journal of pharmaceutics
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abstract：:The objectives of this work were to develop a liposomal fasudil, an antivasospastic drug, as a possible means to deliver the encapsulated drug to the brain, and to characterize the stability of the liposomal formulation in vitro. Transmembrane electrochemical gradients of H+ or ammonium sulfate were created, and their...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
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abstract：:Mini-tablets are an age appropriate dosage form for oral administration to pediatric and geriatric patients, either as individual mini-tablets or as composite dosage units. Smaller size mini-tablets than the commonly used 2 mm or larger size would offer more tailored micro-dose delivery of investigational drugs. This ...
journal_title：International journal of pharmaceutics
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journal_title：International journal of pharmaceutics
pub_type： 杂志文章,评审
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journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2004.11.035
更新日期：2005-04-11 00:00:00
abstract：:This study assesses the feasibility of printing implantable devices using 3D printing Fused deposition modeling (FDM) technology. The influence of the deposition temperature, the deposition rate and the layer thickness on the printing process and the physical properties of the devices were evaluated. The filaments wer...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2019.05.008
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abstract：:To prolong the precorneal resident time and improve ocular bioavailability of the drug, Pluronic F127-g-poly(acrylic acid) copolymers were studied as in situ gelling vehicle for ophthalmic drug delivery system. The rheological properties and in vitro drug release of Pluronic-g-PAA copolymer gels were investigated. The...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2007.09.005
更新日期：2008-02-28 00:00:00
abstract：:The objective of this study was to investigate the presence of amino acid transporters on the corneal epithelium and to enhance corneal drug absorption through prodrug modification targeted to the amino acid transporters. SIRC was used as a model cell line representing the corneal epithelium. Uptake studies were carri...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
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journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/s0378-5173(02)00546-x
更新日期：2003-01-02 00:00:00
abstract：:The emulsions with various oils such as linseed oil, soybean oil and squalene were prepared to obtain the relationship between the stability and the transfection activity of the emulsions. 1,2-Dioleoyl-sn-glycero-3-trimethylammonium-propane (DOTAP) was used as a single cationic lipid emulsifier. The droplet sizes and ...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
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更新日期：2003-02-18 00:00:00
abstract：:Three-dimensional printing (3DP) is a highly disruptive technology with the potential to change the way pharmaceuticals are designed, prescribed and produced. Owing to its low cost, diversity, portability and simplicity, fused deposition modeling (FDM) is well suited to a multitude of pharmaceutical applications in di...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章,评审
doi：10.1016/j.ijpharm.2018.07.024
更新日期：2018-09-05 00:00:00
abstract：:In vitro and in vivo investigations were conducted to develop a suitable formulation for early toxicology and clinical studies of ((R)-7-(3,4-dichlorophenyl)-5-methyl-4,7-dihydropyrazolo[1,5-a]pyrimidin-6-yl)((S)-2-(4-fluorophenyl)pyrrolidin-1-yl)methanone (Compound A), a nonionizable and poorly water-soluble compound...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2012.04.075
更新日期：2012-08-20 00:00:00
abstract：:The LR12 peptide has been reported to reduce the size of infarct and improve both cardiac function and survival in myocardial infarction in murine models, after daily repeated intraperitoneal injections. In order to protect peptide from degrading and to prolong its release, in situ implants based on biocompatible biod...
journal_title：International journal of pharmaceutics
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journal_title：International journal of pharmaceutics
pub_type： 杂志文章
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journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2006.07.031
更新日期：2006-12-11 00:00:00
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journal_title：International journal of pharmaceutics
pub_type： 杂志文章
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更新日期：2001-02-01 00:00:00
abstract：:Anticancer drug doxorubicin (DOX) was physically loaded into the micelles prepared from poly(2-ethyl-2-oxazoline)-b-poly(L-lactide) diblock copolymers (PEOz-PLLA). PEOz-PLLA consists of hydrophilic segment PEOz and hydrophobic segment PLLA showed pH-sensitivity in the aqueous solution. The DOX-loaded micelle exhibited...
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pub_type： 杂志文章
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更新日期：2006-07-06 00:00:00
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journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2018.06.032
更新日期：2018-08-25 00:00:00
abstract：:HN-1, a 12-amino acid peptide, has been reported to possess strong capabilities for targeting and penetrating head and neck squamous cell carcinoma. Here, we designed a simple but effective nanoparticle system for the delivery of doxorubicin (DOX) targeting oral squamous cell carcinoma (OSCC) through the mediation of ...
journal_title：International journal of pharmaceutics
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doi：10.1016/j.ijpharm.2017.04.027
更新日期：2017-06-15 00:00:00
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更新日期：2009-02-23 00:00:00
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journal_title：International journal of pharmaceutics
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abstract：:The purpose of this study is to establish a novel approach for preparing a solid dispersion drug product using spherical silicate by a Wurster-type fluidized bed granulator. The spherical silicate used in this study has porous structure and ideal particle size for loading by a Wurster-type fluidized bed granulator. As...
journal_title：International journal of pharmaceutics
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更新日期：2014-11-20 00:00:00
abstract：:The aim of this study was to evaluate the transdermal permeation enhancement of N-trimethyl chitosan (TMC) with different degrees of quaternization (DQ). TMCs with DQ of 40 and 60% (TMC40 and TMC60) were synthesized and characterized by (1)H NMR. Testosterone (TS) used as an effective drug, four different gels were pr...
journal_title：International journal of pharmaceutics
pub_type： 杂志文章
doi：10.1016/j.ijpharm.2007.12.050
更新日期：2008-05-22 00:00:00
