Agglomerated Oral Dosage Forms of Artemisinin/β-Cyclodextrin Spray-Dried Primary Microparticles Showing Increased Dissolution Rate and Bioavailability
| Autor: | Alessandra Rossi, Paolo Colombo, Fabio Sonvico, Ruggero Bettini, Nurzalina Abdul Karim Khan, Gaia Colombo, Enrico Magosso, Anna Giulia Balducci, Kah Hay Yuen |
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| Rok vydání: | 2013 |
| Předmět: |
Agglomerates
Artemisinin Cyclodextrin Malaria Microparticles Magnetic Resonance Spectroscopy Administration Oral Biological Availability Pharmaceutical Science Powder Dosage Form Beta-Cyclodextrins Aquatic Science Dosage form Spectroscopy Fourier Transform Infrared parasitic diseases Drug Discovery medicine Organic chemistry Pharmacology & Pharmacy Solubility Dissolution Ecology Evolution Behavior and Systematics Dosage Forms chemistry.chemical_classification Calorimetry Differential Scanning Ecology beta-Cyclodextrins General Medicine Artemisinins Bioavailability chemistry Microscopy Electron Scanning Thermodynamics Agronomy and Crop Science Research Article Nuclear chemistry medicine.drug |
| Zdroj: | AAPS PharmSciTech. 14:911-918 |
| ISSN: | 1530-9932 |
| DOI: | 10.1208/s12249-013-9982-9 |
| Popis: | Artemisinin, a poorly water-soluble antimalarial drug, presents a low and erratic bioavailability upon oral administration. The aim of this work was to study an agglomerated powder dosage form for oral administration of artemisinin based on the artemisinin/β-cyclodextrin primary microparticles. These primary microparticles were prepared by spray-drying a water-methanol solution of artemisinin/β-cyclodextrin. β-Cyclodextrin in spray-dried microparticles increased artemisinin water apparent solubility approximately sixfold. The thermal analysis evidenced a reduction in the enthalpy value associated with drug melting, due to the decrease in drug crystallinity. The latter was also evidenced by powder X-ray diffraction analysis, while 13C-NMR analysis indicated the partial complexation with β-cyclodextrin. Agglomerates obtained by sieve vibration of spray-dried artemisinin/β-cyclodextrin primary microparticles exhibited free flowing and close packing properties compared with the non-flowing microparticulate powder. The in vitro dissolution rate determination of artemisinin from the agglomerates showed that in 10 min about 70% of drug was released from the agglomerates, whereas less than 10% of artemisinin was dissolved from raw material powder. Oral administration of agglomerates in rats yielded higher artemisinin plasma levels compared to those of pure drug. In the case of the agglomerated powder, a 3.2-fold increase in drug fraction absorbed was obtained. © 2013 American Association of Pharmaceutical Scientists. |
| Databáze: | OpenAIRE |
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