 <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]  if you develop a rash or other serious side effects. See Side Effects section.The side effects of Sulfacetamide Sodium-Sulfur Topical: Mild peeling of the top layer of skin is expected. Skin irritation, redness, and scaling may also occur. If any of these effects last or get worse, stop using this medication and tell your doctor or pharmacist promptly. Remember that this medication has been prescribed because your doctor has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Rarely, sodium sulfacetamide products applied to the skin may be absorbed and may cause serious side effects. Stop using this product and tell your doctor right away if you have any serious side effects, including: aching/swollen joints, rash on nose and cheeks, signs of infection (such as sore throat that doesn't go away, fever), signs of anemia (such as unusual tiredness/weakness, rapid breathing, fast heartbeat), unusual bleeding/bruising, signs of liver problems (such as nausea that doesn't stop, dark urine, yellowing eyes/skin, stomach/abdominal pain, vomiting), mouth sores. A very serious allergic reaction </s>