If you are using a version of enthought python (EPD) you might want to go directly to your site-packages and reinstall numpy. Then try to install pandas with pip. You will have to modify your installation prefix for that.
If the problem persists (as it did with me) try downloading pandas tar ball, unpack it in your site packages and run setup.py install
from your pandas directory.
If you got your dependencies right you can import pandas and check it imports smoothly.