veterinarianon here.
I have tried and tried over the years to get clients/vet. oncologists to try fenben. Finally getting some ears/eyes on it with the more attentive/open-minded….
I will say this- one of the most popular -(and the one I most prescribe)-heartworm medications contains it- and I have a VERY low percentage of patients with cancer compared to my peers. Not a DB-PC study but hey… it def. supports some efficacy.