Abstract: The present invention relates to monomeric and multimeric peptidic compounds which have antipathogenic, in particular antiviral or/and antibacterial activity. In a preferred aspect, the peptide compounds of the invention have an activity in respect of a broad spectrum of viruses, both DNA and RNA viruses, irrespective of whether they possess virus envelope or not. Further, the present invention refers to compositions comprising said peptidic compounds for medical use, i.e. for the treatment or prevention of pathogenic, in particular viral or/and bacterial infections.