How long are oral contraceptives taken for?

There have actually been studies that prove taking the pill for a few years can help reduce your risks of certain cancers.

It has also been said (and you find this in your pill packets sometimes) that taking for more than 8 years can increase your rate of cervical/uterine cancers. :(

Ask your doctor, and remember, there are tons of other methods that work just as well out there if your doctor gives your pills a cut-off date.