Letter to Healthcare Professionals - Amgen

69924-R1-V1
(oxaliplatin, irinotecan, bolus 5-FU, and/or infusional 5-FU) over the first 24 weeks on study,
compared with those randomized to bevacizumab and chemotherapy.
In a single-arm study of 19 patients receiving Vectibix in combination with IFL, the incidence of NCI-
CTC grade 3-4 diarrhea was 58%; in addition, grade 5 diarrhea occurred in one patient. In a singlearm
study of 24 patients receiving Vectibix plus FOLFIRI, the incidence of NCI-CTC grade 3 diarrhea
was 25%.
Severe diarrhea and dehydration, which may lead to acute renal failure and other complications,
have been observed in patients treated with Vectibix in combination with chemotherapy.
Vectibix is indicated as a single agent for the treatment of epidermal growth factor receptor (EGFR)-expressing,
metastatic colorectal carcinoma (mCRC) with disease progression on or following fluoropyrimidine-, oxaliplatin-,
and irinotecan-containing chemotherapy regimens. The effectiveness of Vectibix as a single agent for the
treatment of EGFR-expressing, metastatic colorectal carcinoma is based on improvement of progression-free
survival. Currently, no data demonstrate an improvement in disease-related symptoms or increased survival with
Vectibix.
These are not the only risks associated with the use of Vectibix. Please see the enclosed full prescribing
information for more information about the risks associated with the use of this product. This information is also
available at www.vectibix.com.
Should you have any questions, require further information on product safety, or wish to report adverse patient
experiences, please contact Amgen’s Medical Information Connection at 1-800-77-AMGEN.
Alternatively, adverse events may be reported to FDA’s MedWatch reporting system:
� by phone (1-800-FDA-1088), by facsimile (1-800-FDA-0178),
� online (https://www.accessdata.fda.gov/scripts/medwatch/), or
� by mail using the MedWatch Form FDA 3500 postage paid form, to the FDA Medical Products
Reporting Program, 5600 Fishers Lane, Rockville, MD 20852-9787.
Sincerely,
Michael E. Severino, MD
Senior Vice President, Global Development and Chief Medical Officer
Amgen