 <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] . This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: kidney disease, liver disease (including liver problems caused by nitrofurantoin in the past), a certain genetic condition (G-6-PD deficiency), certain blood disorders (such as anemia), lung diseases, certain nerve problems (peripheral neuropathy), certain eye diseases (optic neuritis), diabetes, untreated mineral imbalance, vitamin B deficiency. Nitrofurantoin may cause live bacterial vaccines (such as typhoid vaccine) to not work well. Tell your health care professional that you are using nitrofurantoin before having any immunizations/vaccinations. Older adults may be at a greater risk for side effects while using this drug, especially nerve, liver or lung problems. During pregnancy, this medication should be used only when clearly needed. This medication should not be used if you are near or at the time of delivery (weeks 38-42 of pregnancy) due to possible harm to the newborn, such as a certain blood problem (hemolytic anemia). Discuss the risks and benefits with your doctor. This medication </s>