 <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]  side effects, including: headache that is severe or doesn't go away, new signs of infection (such as sore throat that doesn't go away, fever), easy bruising/bleeding, mental/mood changes, vision changes. This drug may rarely cause serious (possibly fatal) liver disease, blood or nerve problems. Tell your doctor right away if you notice any of the following serious side effects: nausea/vomiting that doesn't stop, unusual tiredness, dark urine, yellowing of eyes/skin, fast/pounding heartbeat, numbness/tingling of the arms/legs, muscle weakness. This medication may rarely cause a severe intestinal condition due to a bacteria called C. difficile. This condition may occur during treatment or weeks to months after treatment has stopped. Tell your doctor right away if you develop: diarrhea that doesn't stop, abdominal or stomach pain/cramping, blood/mucus in your stool. If you have these symptoms, do not use anti-diarrhea or opioid products because they may make symptoms worse. Use of this medication for prolonged or repeated periods may result in oral thrush or a new vaginal yeast infection (such as oral or vaginal fungal infection). Contact your doctor if you notice white patches </s>