This clinical trial is focused on studying the treatment of metastatic non-small cell lung cancer (NSCLC), which is a type of lung cancer that has spread to other parts of the body. The study is investigating the use of a medication called pembrolizumab, also known by its code name MK-3475, in combination with chemotherapy drugs. The chemotherapy drugs involved in this study include cisplatin, carboplatin, paclitaxel, paclitaxel albumin-bound, and pemetrexed. Pembrolizumab is a type of treatment known as immunotherapy, which helps the immune system fight cancer.
The purpose of this study is to compare two different ways of giving pembrolizumab: as a subcutaneous injection (under the skin) and as an intravenous infusion (through a vein). Participants will receive pembrolizumab along with one of the chemotherapy drugs as part of their first-line treatment, which means it is the first treatment given for their cancer. The study will help determine how the body processes pembrolizumab when given in these two different ways and will also look at the safety of these treatments.
Participants in the study will receive treatment over a period of time, with regular visits to the clinic for their medication and monitoring. The study will track how well the cancer responds to the treatment and any side effects that may occur. This information will help doctors understand the best way to use pembrolizumab in combination with chemotherapy for treating metastatic non-small cell lung cancer.



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