Relationship between lipophilicity of BCS class III and IV drugs and the functional activity of peroral absorption enhancers

Il Farmaco ◽  
2005 ◽  
Vol 60 (11-12) ◽  
pp. 870-873 ◽  
Author(s):  
Pradeep Sharma ◽  
Manthena V.S. Varma ◽  
Harmander P.S. Chawla ◽  
Ramesh Panchagnula
2019 ◽  
Vol 10 (2) ◽  
pp. 1143-1151
Author(s):  
Ravindra Babu M ◽  
Ravi Prakash P ◽  
Devanna N

The purpose of the present study was to formulate Solid Lipid Nanoparticles (SLNs) of Ganciclovir (GCV) in combination with Chitosan and Piperine for absorption enhancement effect. GCV loaded SLNs were prepared by hot homogenization method, optimized and characterized. Formulated SLNs were incorporated with absorption enhancers and characterized for invitro absorption (with chicken intestine), histopathological and invivo pharmacokinetic studies. Invitro absorption studies revealed that the permeability coefficient of the prepared formulation is more when compared to the pure drug, so the permeability is more for prepared formulation. In vivo pharmacokinetic study showed a significant increase in the Cmax, AUC, biological half-life and decrease in elimination rate constant for prepared formulation compared to pure drug. Histopathological studies also showed mild reversible damage of epithelial cells with Chitosan which indicates the safety and efficacy of the formulation. Thus, GCV loaded SLNs prepared with Chitosan can be clinically promising for enhancing the oral, intestinal absorption of the said BCS Class-III drug.


2020 ◽  
Vol 43 ◽  
Author(s):  
David Spurrett

Abstract Comprehensive accounts of resource-rational attempts to maximise utility shouldn't ignore the demands of constructing utility representations. This can be onerous when, as in humans, there are many rewarding modalities. Another thing best not ignored is the processing demands of making functional activity out of the many degrees of freedom of a body. The target article is almost silent on both.


2019 ◽  
Vol 26 (3) ◽  
pp. 90-100
Author(s):  
Justė Lukoševičiūtė ◽  
Kastytis Šmigelskas

Abstract. Illness perception is a concept that reflects patients' emotional and cognitive representations of disease. This study assessed the illness perception change during 6 months in 195 patients (33% women and 67% men) with acute coronary syndrome, taking into account the biological, psychological, and social factors. At baseline, more threatening illness perception was observed in women, persons aged 65 years or more, with poorer functional capacity (New York Heart Association [NYHA] class III or IV) and comorbidities ( p < .05). Type D personality was the only independent factor related to more threatening illness perception (βs = 0.207, p = .006). At follow-up it was found that only self-reported cardiovascular impairment plays the role in illness perception change (βs = 0.544, p < .001): patients without impairment reported decreasing threats of illness, while the ones with it had a similar perception of threat like at baseline. Other biological, psychological, and social factors were partly associated with illness perception after an acute cardiac event but not with perception change after 6 months.


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