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Effect of Cyclodextrin Complexation on the Pharmacokinetic and Biopharmaceutical Properties of Silybin

Very Rapid Dissolution and Absorption :


The novel formulation of silybin / ß-cyclodextrin inclusion complex makes silybin, the main active constituent of Silymarin, immediately bioavailable. Upon administration, an association-dissociation equilibrium is rapidly established with free individual silybin molecules readily available for absorption (in contrast to clumping which usually occurs with conventional tablet and capsule forms).


silybin / ß-cyclodextrin
inclusion complex
  ß-cyclodextrin
molecule
single silybin
molecule
 

Single silybin melocules are instantaneously absorbed and the equilibrium is rapidly shifted to the right hand side.



 
Comparison of Dissolution of Silybin and Silybin-ß-cyclodextrin.

The test was carried out at pH 7.5 and a temp. of 37 °C.

 
Ref. Arcari M, Brambilla A, Wachter W P, et al. A new inclusion complex of silybin and beta-cyclodextrin. Boll Chim Pharm 1992;131:205-9


Enhancement of the Pharmacological Effect :

  As with a rapid onset of action, the administration of silybin / ß-cyclodextrin inclusion complex increases the intensity of therapeutic effects. This is usually noticed by the patients as a mild laxative effect, indicating liver function improvement.


 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
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