alternatives to erbitux

My husband had the worst reaction to his first erbitux treatment.   He has a good amount of cancer growth in both lungs.  He has done well with treatment up until this point no signs of active cells in liver or nodes in that area as before.  Waiting to hear from drs for next step - so I was wondering if anyone has been in this same situation and what they might have done next.  Thanks so much for any feed back.  Kelly