Non-Small Cell Lung Cancer (NSCLC): Erlotinib Teva is indicated for the first-line treatment of patients with locally advanced or metastatic non-small cell lung cancer (NSCLC) with EGFR activating mutations. Erlotinib Teva is indicated for switch maintenance treatment in patients with locally advanced or metastatic non-small cell lung cancer (NSCLC) with EGFR activating mutations and stable disease after first-line chemotherapy. Erlotinib Teva is indicated for the treatment of patients with locally advanced or metastatic non-small cell lung cancer after failure of at least one prior chemotherapy regimen.Pancreatic cancer: Erlotinib Teva is indicated in combination with gemcitabine for the first-line treatment of patients with locally advanced, unresectable or metastatic pancreatic cancer.