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Current Drug Delivery

Author(s): Shabina Mahmood, Manal Ali Buabeid, Kaleem Ullah, Ghulam Murtaza*, Abdul Mannan and Shujaat Ali Khan*

DOI: 10.2174/1567201816666190208165511

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Synthesis, Characterization and Safety Profiling of Eudragit-Based pHResponsive Hydrogels: A Promising Platform for Colonic Delivery of Losartan Potassium

Page: [548 - 564] Pages: 17

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Abstract

Objective: The aim of the present study was to design an efficient delivery system with an anticipated swelling and drug release properties for a prolonged drug release as well as to target colon for various hydrophilic drugs.

Method: For this purpose, the pH-responsive hydrogel comprising a combination of Eudragit and acrylic acid was formed. The hydrogels were characterized for spectral (FTIR), thermal (TGA/DSC), structural (XRD), and morphological (SEM) investigations. Oral tolerability was assessed in rabbits for biocompatibility and oral use of the prepared hydrogels.

Results: The results showed that an increased incorporation of Eudragit and cross-linking agent retorted the swelling, drug loading, and drug release properties at both acid (pH 1.2) and basic pH (pH 6.8 and 7.4) , while acrylic acid presented the inverse results. The oral tolerability and toxicity studies depicted that the developed hydrogels were safe up to 3800 mg/kg body weight and caused no hematological or histopathological changes when compared with the control group.

Conclusion: Therefore, the newly developed formulations presented adequate swelling, drug loading, release behavior, and biocompatibility properties and thus can be used as a promising tool for the colonic delivery of various hydrophilic drugs.

Keywords: Eudragit S-100, acrylic acid, crosslinking, colonic delivery, losartan potassium, drug delivery.

Graphical Abstract

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