 <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]  problems. Talk to your pharmacist for more details. Before using this medication, tell your doctor or pharmacist your medical history, especially of: asthma, kidney disease, liver disease. This medication contains sodium. This could affect you if you are on a salt-restricted diet or if you have a condition which could be worsened with an increase in salt intake (such as congestive heart failure). Consult your doctor or pharmacist for more information. Nafcillin may cause live bacterial vaccines (such as typhoid vaccine) to not work well. Tell your health care professional that you are using nafcillin before having any immunizations/vaccinations. Older adults may be at greater risk for side effects while using this drug. Liver and kidney functions are not fully developed in newborns and infants. This medication is removed by the liver. Newborns and infants may be a greater risk for side effects while using this drug. During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor. This drug passes into breast milk. Consult your doctor before breast-feeding.The interactions of Nafcillin Intravenous: Drug interactions may change how your medications work or increase your risk for serious side effects. This document </s>