Pharm Sci. 2019;25(4): 311-318.
doi: 10.15171/PS.2019.34

Scopus ID: 85077614678
  Abstract View: 475
  PDF Download: 302

Research Article

Fast Dissolving Sublingual Strips: A Novel Approach for the Delivery of Isosorbide Dinitrate

Marzieh Fathi 1 ORCID logo, Mitra Alami-milani 2,3, Sara Salatin 1,3, Sharahm Sattari 4, Hassan Montazam 5, Farhad Fekrat 3, Mitra Jelvehgari 2,6* ORCID logo

1 Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran.
2 Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
3 Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran.
4 Nikookari Ophtalmology Center, Tabriz University of Medical Sciences, Tabriz, Iran.
5 Islamic Azad University of Bonab Unit, Bonab, Iran.
6 Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran.


Background: Isosorbide dinitrate (ISDN) is used for treating the angina attacks. In addition, oral ISDN is available in immediate and sustained release formulations and the bioavailability of ISDN is about 20-25% when taken orally. Further, the ISDN films are developed for sublingual drug delivery by improving drug bioavailability. The present study aimed to design and evaluate the physicochemical properties of the film formulation for sublingual delivery of ISDN. Methods: In the present study, sublingual films were prepared by the solvent casting technique using the hydroxypropyl methylcellulose (HPMC) polymers (i.e., 100, 150 and 200 mg) with a different drug to polymer ratios (i.e., 1:5, 1:7.5 and 1:10). Then, ISDN was evaluated for the film appearance, drug content, surface pH, mucoadhesion force, differential scanning calorimetry (DSC), in vitro drug release, and ex vivo permeability. Results: Based on the results, F3 formulation (1:10 ISDN to HPMC ratio) showed acceptable thickness (0.93 mm), weight (11.14 mg), surface pH (7.82), moisture absorption capacity (6.08%), elasticity (>200), mucoadhesion force (18.05 N/cm2), and drug content (6.22%). Furthermore, the results demonstrated that HPMC polymer improved the characteristics of the films, modified the bioadhesiveness, and finally, enhanced elasticity. However, DSC thermogram failed to show any crystalline drug substance in the films except for F1 (immediate release) and the endothermic peak of ISDN was absent in F2 and F3 films. Therefore, the drug which was entrapped into the film was in an amorphous or disturbed-crystalline phase of the molecular dispersion or dissolved in the melted polymer in the polymeric matrix. Moreover, the drug release from the films was faster compared to the tablet® (P<0.05). Conclusion: In general, the formulation of F1 was observed to be an appropriate candidate for developing the sublingual film for the remedial use.
Keywords: Film, Sublingual, Isosorbide dinitrate, HPMC, Mucoadhesion
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Abstract View: 475

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Submitted: 19 Nov 2018
Revision: 06 Apr 2019
Accepted: 12 Apr 2019
ePublished: 20 Dec 2019
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