Alimta trade name for ‘PEMETREXED’ is used to treat certain types of cancer (e.g., lung cancer, mesothelioma) & manufactured by Eli Lilly. It is a chemotherapy drug that is used alone or in combination with other medications to slow or stop cancer cell growth. Alimta is a cancer medication that interferes with the growth of cancer cells and slows their growth and spread in the body. Alimta is used to treat mesothelioma, a form of lung cancer associated with exposure to asbestos. Alimta is also used to treat non-small cell lung cancer that has already been treated with other cancer medications. Alimta may also be used for other purposes not listed in this medication guide.