Tykerb Only

I am new to this website.
I was diagnosed in January 2006 with Infiltrating DCIS, grade 3, Stage 1, ER/PR negative..HER2 positive...no lymph node's involved..9MM in diameter in right breast only.
Had lumpectomy...completed Chemo, radiation and one year of Herceptin in 2007
In January 2009 had recurrence in same breast...same diagnosis DCIS, grade 3, Stage 1...HER2 positive...5 mm in diameter.
Had right breast mastectomy February 2009...completed 8 sessions of Taxol.
I just began "Tykerb Only" in December 2009.. 5 tablets a day. About 3 1/2 weeks into taking Tykerb I developed a "bad" rash over my "whole" body. I was told to stop taking Tykerb.
I stopped taking Tykerb til rash was gone and am now getting ready to try this again at reduced dose (4 tablets) a day. I have read several messages regarding a rash but no one has mentioned a "whole" body rash. It also itched at times.
Has anyone experienced this type of rash? If so, how was it treated? Did you continue taking Tykerb or was it stopped altogether?
I am hoping the reduced dose will help alleviate this rash.
Thanks....Sharon