Study of Tislelizumab and Platinum-based Chemotherapy Combination With H1 Receptor Antagonist（Diphenhydramine）in Advanced and Metastatic Non-Small Cell Lung Cancer

The goal of this clinical trial is to learn if diphenhydramine can improve the effectiveness and decrease the toxicity for the treatment of advanced and metastatic Non-small cell lung cancer (NSCLC) with PD1 inhibitor plus chemotherapy. The main questions it aims to answer are: * Dose diphenhydramine improve the effectiveness and survival of advanced and metastatic NSCLC treated with PD1 inhibitor and chemotherapy? * Dose diphenhydramine decrease the toxicity of PD1 inhibitor plus platinum-based chemotherapy? * Researchers will compare patients with or without diphenhydramine to see if diphenhydramine works to improve the effectiveness and decrease the toxicity. Participants will: * Take standard treatment (tislelizumab and platinum-based chemotherapy) with/without diphenhydramine（20mg qd d0-2）every cycle. * Visit the clinic once every six weeks for checkups and tests * Keep a diary of their symptoms and survival visit based on the protocol.

NCT Number	NCT06704620
Lead Sponsor	Tianjin Medical University Cancer Institute and Hospital
Conditions	Advanced and Metastatic NSCLC
Enrollment	430 participants
Start Date	2024-12
Primary Completion	2026-11 (estimated)
Study Completion	2027-11 (estimated)
Updated on ClinicalTrials.gov	2024-12-16