Formulation of levodopa containing dry powder for nasal delivery applying the quality-by-design approach

Csilla Bartos, Edina Pallagi, Piroska Szabó-Révész, Rita Ambrus, Gábor Katona, Tamás Kiss, Mernaz Rahimi, Ildikó Csóka

Research output: Contribution to journalArticle

5 Citations (Scopus)


The aim of this work was to carry out preliminary experiments for preparation of levodopa (LEVO)-containing intranasal powder. The experiments were designed according to the Quality by Design (QbD) concept. Based on prior risk assessment, LEVO and chitosan (CH) or sodium hyaluronate (HA) as mucoadhesive matrix formers were co-milled using planetary ball mill to prepare microparticles as drug delivery systems. The rotation speed, the milling time and the drug-additive ratio were evaluated to be the most relevant milling factors - as a result of the initial risk assessment; which were set according to a factorial design. The effects of critical process parameters and excipients were investigated on the particle size and surface characteristics of products, and on the crystallinity, in vitro dissolution and permeability of LEVO. Milling in the presence of higher amount of HA resulted in smaller average particle size of powders (D50 = 13.068 μm) and higher initial dissolution and permeation of LEVO compared to CH-containing formulations (D50 = 21.667 μm).

Original languageEnglish
Pages (from-to)475-483
Number of pages9
JournalEuropean Journal of Pharmaceutical Sciences
Publication statusPublished - Oct 15 2018


  • Chitosan
  • Dry milling
  • Intranasal powder
  • Levodopa
  • Quality-by-design
  • Sodium hyaluronate
  • in vitro dissolution and permeability

ASJC Scopus subject areas

  • Pharmaceutical Science

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