Model drug release from matrix tablets composed of HPMC with different substituent heterogeneity
Artikel i vetenskaplig tidskrift, 2010

The release of a model drug substance, methylparaben, was studied in matrix tablets composed of hydroxypropyl methylcellulose (HPMC) batches of the USP 2208 grade that had different chemical compositions. It was found that chemically heterogeneous HPMC batches with longer sections of low substituted regions and lower hydroxypropoxy content facilitated the formation of reversible gel structures at a temperature as low as 37 degrees C. Most importantly, these structures were shown to affect the release of the drug from matrix tablets, where the drug release decreased with increased heterogeneity and a difference in T80 values of 7 h was observed between the compositions. This could be explained by the much lower erosion rate of the heterogeneous HPMC batches, which decreased the drug release rate and also released the drug with a more diffusion based release mechanism compared to the less heterogeneous batches. It can therefore be concluded that the drug release from matrix tablets is very sensitive to variations in the chemical heterogeneity of HPMC.

solubility

methyl cellulose

gelation

matrices

erosion

Hydrophilic matrix tablets

Batch-to-batch variation

Hydroxypropyl

hydroxypropyl methylcellulose

Chemical heterogeneous

hydrophilic

polymer

behavior

trichoderma-reesei

Drug release

methylcellulose

enzymatic degradation

Författare

Anna Viridén

Chalmers, Kemi- och bioteknik, Farmaceutisk teknologi

SuMo Biomaterials

Anette Larsson

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Farmaceutisk teknologi

H. Schagerlof

Lunds universitet

Bengt Wittgren

AstraZeneca AB

International Journal of Pharmaceutics

0378-5173 (ISSN)

Vol. 401 1-2 60-67

Ämneskategorier

Farmaceutisk vetenskap

DOI

10.1016/j.ijpharm.2010.09.017

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Senast uppdaterat

2018-03-21