Herceptin, Paclitaxel and Gemcitabine

[caregiver]

Breast Cancer with Liver met.

We recently found out that the cancer has recently spread to lungs.
we are in consultation we two doctors and one of them is prescribing Herceptin and paclitaxel combination. But the other doctor is suggesting Herceptin, paclitaxel and gemcitabine combination and says that gemcitabine will fight lung cancer. The other doctor is of the opinion that Her and paclitaxel combination should take care of it...Has any one had Herceptin, paclitaxel and gemcitabine combination???