Taking 300 milligrams of aspirin daily for 5 years might cut the risk of colon cancer by almost 40 percent, according to a new British
study, and may cut the risk by almost 75 percent in people who take it
for 10 to 15 years. However, the researchers warn that this type of
therapy is only recommended for people at high risk of developing
colon cancer, as long-term use of higher levels of aspirin therapy
has potential dangers, such as gastrointestinal bleeding.