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Recent Advances in Anti-Infective Drug Discovery

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ISSN (Print): 2772-4344
ISSN (Online): 2772-4352

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Research Article

Assessment of the Anti-Malarial Properties of Dihydroartemisinin- Piperaquine Phosphate Solid Lipid-Based Tablets

Author(s): Chime Salome Amarachi*, Anthony Amaechi Attama and Godswill Chukwunweike Onunkwo

Volume 17, Issue 2, 2022

Published on: 13 September, 2022

Page: [103 - 117] Pages: 15

DOI: 10.2174/2772434417666220606105822

Price: $65

Abstract

Background: Artemisininbased combination therapies (ACTs) typified by dihydroartemisinin- piperaquine phosphate are first-line drugs used in the treatment of Plasmodium falciparum malaria. However, the emergence of drug resistance to ACTs shows the necessity to develop novel sustained release treatments in order to ensure maximum bioavailability.

Objectives: To formulate dihydroartemisinin (DHA)-piperaquine phosphate (PQ) sustained release tablets based on solidified reverse micellar solutions (SRMS).

Methods: The SRMS was prepared by fusion using varying ratios of Phospholipon® 90H and Softisan® 154 and characterised. The tablets were prepared by using an in-house made and validated mould. The formulations were tested for uniformity of weight, hardness, friability, softening time, erosion time and in vitro-in vivo dissolution rate. Antimalarial properties were studied using modified Peter’s 4-days suppressive test in mice. One-way analysis of variance (ANOVA) was used in the analysis of results.

Results: Smooth caplets, with average weight of 1300 ± 0.06 mg to 1312 ± 0.11 mg, drug content of 61 mg for DHA and t 450 mg for PQ. Tablet hardness ranged from 7.1 to 9.0 Kgf and softening time of 29.50 ± 1.90 min. Erosion time of 62.00 ± 2.58 to 152.00 ± 1.89 min were obtained for tablets formulated with Poloxamer 188 (Batches R2, S2 and T2) which significantly reduced the softening and erosion time (p < 0.05). In vitro release showed that the optimized formulations had a maximum release at 12 h. Formulations exhibited significantly higher parasitaemia clearance and in vivo absorption compared to marketed formulations at day 7 (p < 0.05).

Conclusion: DHA-PQ tablets based on SRMS were much easier and relatively cheaper to produce than compressed tablets. They also showed exceptionally better treatment of malaria owing to their sustained release properties and improved bioavailability and are recommended to Pharmaceutical companies for further studies.

Keywords: Artemisinin based combination therapy, dihydroartemisinin, malaria parasite, piperaquine phosphate, reverse micelles, solid lipids.

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