Cetuximab in Combination With S-1 and Cisplatin in Gastric Cancer

Single first dose of cetuximab 400 milligram per square meter (mg/m\^2) will be administered intravenously followed by once weekly subsequent intravenous infusion of cetuximab 250 mg/m\^2 in each 5-week treatment cycle until disease progression, unacceptable toxicity, or withdrawal of consent.

Cisplatin 60 mg/m\^2 will administered as intravenous infusion on Day 8 of each 5-week cycle maximum up to 8 cycles until disease progression, unacceptable toxicity, or withdrawal of consent

S-1, a combination of tegafur, gimeracil, and oteracil will be administered intravenously at a dose of 40 to 60 mg/m\^2 orally twice daily for first three consecutive weeks of 5-week cycle until disease progression, unacceptable toxicity, or withdrawal of consent.