Disclosed herein are compositions comprising lopinavir alone or in combination with ritonavir for use as a medicament in the treatment of cancer or benign proliferative disorders (warts) or in the prevention of the development of cancer. Pharmaceutical compositions formulated for topical application comprising a therapeutically effective amount of lopinavir or a therapeutically effective amount lopinavir and ritonavir in a pharmaceutically acceptable vehicle are also provided. Also disclosed are methods of treating a patient having an HPV related dysplasia of the cervix comprising administering to said patient a therapeutically effective dose of the disclosed pharmaceutical compositions.