The present invention is directed to a reconstituted surfactant comprising a lipid carrier, a polypeptide analog of the native surfactant protein SP-C, and a polypeptide comprising a sequence of repeated units constituted of a number of hydrophobic amino acid residues comprised between 3 and 8 and one basic amino acid residue. The invention is also directed to the pharmaceutical compositions thereof and to its use for the prophylaxis and/or treatment of RDS and other respiratory disorders.