Glutamine Plus L. Reuteri Prevents TKI Therapy-diarrhea in Patients With NSCLC

Inclusion Criteria: * Both sexes * ≥ 18 years old * Pathologically confirmed diagnosis of NSCLC * Stage IIIB - IV by the American Joint Committee of Cancer Version 8. * Candidates to receive EGFR-TKI treatment (1st \& 2nd generation TKI) * ECOG score ≤ 2 * Life expectancy \> eight weeks * Signed written informed consent Exclusion Criteria: * Patients who cannot attend the first protocol appointment. * Treatment with other anti-cancer therapy * Participating in other clinical trials in the former four weeks * Any other serious condition or uncontrolled active infection, altered mental status or psychiatric disorder that, in the investigator´s opinion, would limit the ability of an individual to meet the requirements of the study or which affects the interpretability of the results. * Active hepatitis virus infection (any serotype) or chronic infection with a potential risk of reactivation evaluated through a serological panel. * Active HIV infection. * Breastfeeding.