Abstract:
:The influence of different types of release modifiers on the dissolution from solid lipid extrudates was investigated. Diprophylline was extruded together with 45% tristearin and 5% (w/w) of a release modifier to suitable extrudates. Three groups of release modifiers were defined: Hydrocolloids, disintegrants and pore formers. All of the release modifier-containing extrudates showed a faster release compared to the reference extrudate, which contained 50% (w/w) of each, API and lipid. Increasing the amount of diprophylline in the binary mixture up to 55% (w/w) also increased its release rate. Compared to this new reference, not all of the release modifier-containing extrudates exhibited an increased dissolution rate. Within the group of pore formers, there was a great discrepancy concerning the dissolution rates. Extrudates containing polyethylene glycol (PEG) exhibited a much higher release rate compared with extrudates containing sodium chloride or mannitol. This behaviour was assumed to be based on the extrusion temperature of 65°C at which PEG exists in the molten state. The hypothesis was tested using different PEGs and another solid lipid.
journal_name
Int J Pharmjournal_title
International journal of pharmaceuticsauthors
Güres S,Kleinebudde Pdoi
10.1016/j.ijpharm.2011.04.010subject
Has Abstractpub_date
2011-06-30 00:00:00pages
77-84issue
1-2eissn
0378-5173issn
1873-3476pii
S0378-5173(11)00314-0journal_volume
412pub_type
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