Persistent low haemoglobin may result from haemolytic anaemia, a rare side effect of Salazar DS Tablet (sulfasalazine), or from other causes such as iron, vitamin B12, or folate deficiencies, or anaemia of chronic disease. It is crucial to have a complete blood test and consult your doctor before starting any treatment. Depending on the cause, your doctor may recommend appropriate supplements, adjust your sulfasalazine dosage, or monitor you closely for signs of anaemia. Regular follow-up is essential to prevent complications and ensure safe and effective treatment.