Hello, Gallbladder cancer is supposed to be the most common and aggressive type among the biliary tree cancers.the best hope lies if the cancer can be completely resected,however only 10% cases present with early stage disease. Patients with unresectable or metastatic  cancers have poor prognosis. The chemotherapy treatment is almost same in all most all centers however recently gemcitabane has been used in combination with cisplatin and this combination has proved to be better suited however drug like oxaliplatin is also being evaluated for the efficacy. My advise to you would be to rely on the wisdom and clinical acumen of the treating doctor and carry on with the treatment. Thanks