The present invention relates to methods for producing nanoparticle and microparticle powders of a biologically active material which have improved powder handling properties making the powders suitable for commercial use using dry milling processes as well as compositions comprising such materials, medicaments produced using said biologically active materials in particulate form and/or compositions, and to methods of treatment of an animal, including man, using a therapeutically effective amount of said biologically active materials administered by way of said medicaments.本発明は、乾式粉砕方法を用いて商業的用途に好適な粉末を作製する、改善された粉末取扱適性を有する生物学的活性物質のナノ粒子及びマイクロ粒子粉末を作製する方法、並びにかかる物質を含む組成物、微粒子形態の前記生物学的活性物質及び/又は組成物を用いて生成される医薬、並びに前記医薬を介して投与される治療有効量の前記生物学的活性物質を用いてヒトを含む動物を治療する方法に関する。【選択図】なし