Nov 13, 2018 Viagra and Cialis: PDE-5 Inhibitors May Have Broader Applications in Cancer, Neurology and ... Viagra and Cialis: PDE-5 Inhibitors May Have Broader Applications in Cancer, Neurology and …... some PDE-5 inhibitors haven't fared as well in cardiovascular clinical trials. There is other work involving PDE-5 inhibitors in neurological disorders, ... read morePublished on 2018-11-13