- Part II (individual patient treatment): Patients receive the most effective drug identified in part I in the absence of disease progression or unacceptable toxicity. The drugs may include bortezomib, capecitabine, cetuximab, docetaxel, erlotinib hydrochloride, gemcitabine hydrochloride, irinotecan hydrochloride, mitomycin C, sirolimus, or thalidomide.