Elecampane has been found to contain alantolactone and based on tests done by the NIH as reported by the Scientific reports journal this specific compound extracted from Elecampane showed it was effective in killing cervical cancer cells at the beginning and ones that were near the end of their cycle but if they are in the middle of their cycle it does not seem to be effective. However it does speed up cell death and if treated early in the cancer cycle it is effective in stopping the spread and growth of cells that are already established. The particular complex protein that Elecampane affects is naturally in your body and it does help with other processes in your cells. However this protein is also responsible for some types of leukemia but testing has never been done on leukemia as cervical cancer seems to be a priority. 

This can also be used on pancreatic cancer as the same properties will apply but they have not studied it as extensively as they have against cervical cancer.

Tinctures can be bought or you can make your own. If you are in a hurry to have it you may want to purchase it as it takes about 2-3 years for the roots to mature enough for use.  If you chose to grow your own, it is possible to do so. They need a moist soil as they grow mostly in area with high amount of rain and rich loamy soil.