Logo-ps
Pharm Sci. 2020;26(3): 314-322.
doi: 10.34172/PS.2020.15

Scopus ID: 85096594817
  Abstract View: 159
  PDF Download: 116

Research Article

Improved Dissolution Behavior of Dipyridamole Formulation with Precipitation Inhibitor

Maryam Maghsoodi 1* ORCID logo, Omid Narimanpour 1

1 School of Pharmacy and Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.

Abstract

Background: Physiologically generated supersaturation and subsequent precipitation of a weakly basic drug in the small intestine leads to compromised bioavailability.
Methods: In this work, the pH -induced precipitation of dipyridamole (DPD) as a model weakly basic drug in the presence of Eudragit L100 (Eu) and hydroxypropyl cellulose (HPC) was investigated. Inhibitory effects of the polymers on precipitation of DPD at varying drug/polymer ratios were examined. The effects of the polymers on the DPD dissolution property were assessed using drug/polymer physical mixtures (PMs) and solid dispersions (SDs).
Results: Significant inhibitory effects on precipitation were found using Eu, while HPC as well inhibited precipitation, but to a lower level than found with Eu. The PMs resulted in higher area under the dissolution curve (AUDC) compared to SDs. For SDs, the AUDC was limited by the slow release of the drug from the polymers in acidic pH which in turn decreased supersaturation of DPD following acidic to neutral pH transition.
Conclusion: From these results, it may be supposed that both the ability to create and stabilize supersaturation separately of each other to be important for enhancing dissolution of DPD.

Keywords: Supersaturation, Dipyridamole, Eudragit L100, Hydroxypropyl cellulose, Precipitation inhibition, Dissolution
First Name
 
Last Name
 
Email Address
 
Comments
 
Security code


Abstract View: 159

Your browser does not support the canvas element.


PDF Download: 116

Your browser does not support the canvas element.

Submitted: 13 Aug 2019
Accepted: 24 Dec 2019
ePublished: 20 Sep 2020
EndNote EndNote

(Enw Format - Win & Mac)

BibTeX BibTeX

(Bib Format - Win & Mac)

Bookends Bookends

(Ris Format - Mac only)

EasyBib EasyBib

(Ris Format - Win & Mac)

Medlars Medlars

(Txt Format - Win & Mac)

Mendeley Web Mendeley Web
Mendeley Mendeley

(Ris Format - Win & Mac)

Papers Papers

(Ris Format - Win & Mac)

ProCite ProCite

(Ris Format - Win & Mac)

Reference Manager Reference Manager

(Ris Format - Win only)

Refworks Refworks

(Refworks Format - Win & Mac)

Zotero Zotero

(Ris Format - Firefox Plugin)