 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  Pemfexy Intravenous: Pemetrexed is used to treat certain types of cancer (such as lung cancer, mesothelioma). It is a chemotherapy drug that works by slowing or stopping the growth of cancer cells. How to use Pemfexy 25 Mg/Ml Intravenous Solution Folate Antagonists Read the Patient Information Leaflet if available from your pharmacist before you start receiving pemetrexed and each time you receive a dose. If you have any questions, ask your doctor or pharmacist. This medication is given by injection into a vein by a healthcare professional. It is given over 10 minutes as directed by your doctor, usually once every 3 weeks. The dosage is based on your medical condition, body size, and response to treatment. To lower your chance of having a skin reaction while using pemetrexed, your doctor will prescribe a corticosteroid medicine (such as dexamethasone) to take for a short period around the time of each treatment. Consult your doctor or pharmacist for more details. To lower your chance of other side effects, it is very important that you take folic acid vitamins and receive vitamin B12 shots before and during treatment with pemetrex </s>