The present invention relates to the use of bifunctional compositions in methods of treating or preventing cancer. The compositions comprise a DNA ligand and a protein ligand for the treatment or prevention of cancer, wherein the DNA ligand interferes with DNA metabolism and the protein ligand interferes with signaling pathways. In particular, the present invention relates to the use of pyronaridine in methods of treating of preventing cancer. The invention also relates to compositions, compounds and medicaments comprising a DNA ligand and a protein ligand, for example, compositions, compounds and medicaments comprising pyronaridine.
