Just looked this up for a friend in need. The drug companies have direct lines one may call, but it seems this place is a clearing-house type of thing, slogs through all of it for you for a ten dollar fee (I don't know anything about them, just what I've read on their site):

http://www.freemedicinefoundation.com/index.html.

Here's the direct link for Pfizer's help page which includes a phone number: http://www.pfizerhelpfulanswers.com/pages/misc/Default.aspx

Good wishes for your friend, Mary and you are a GREAT friend.

kat