Heart drug may have anti-cancer potential
 

http://www.nlm.nih.gov/medlineplus/n...ory_73572.html

The article is about an animal study of the anti-cancer potential of digoxin, but mentions that
a long-term retrospective study of 175 women with breast cancer found that 6 percent of women on digitalis-based drugs died following breast cancer versus 34 percent without. Of course, the numbers were probably small.