Biocompatible nano-polymer particle comprises a biocompatible polymer, a stabilizer and an active ingredient for treating pulmonary hypertension or erectile dysfunction. An independent claim is also included for preparing biocompatible nano-polymer particle, comprising (a) dissolving the biocompatible polymer and the active ingredient in a solvent to form an organic phase, (b) emulsifying the organic phase in an aqueous phase containing a stabilizer, (c) mixing the organic and aqueous phase, and (d) removing the solvent and obtaining the particles in suspension, or carrying out the step (a) and spray-drying the organic phase. ACTIVITY : Hypotensive; Respiratory-Gen; Vasotropic. No biological data given. MECHANISM OF ACTION : Phosphodiesterase-5 inhibitor; Guanylate cyclase activator; Guanylate cyclase stimulator; Endothelin receptor antagonist.本発明は、生体適合性ナノポリマー粒子を提供し、前記粒子は、生体適合性ポリマー、安定化剤および肺高血圧症または勃起不全を治療するための活性成分からなり、肺高血圧症または勃起不全を治療するための製剤を製造するために使用され得る。