Nitazoxanide 500mg is commonly prescribed for treating amebiasis, an intestinal infection caused by Entamoeba histolytica. The medication works by inhibiting the energy production pathways of the parasite, leading to its elimination. Clinical effects may begin within a few days of starting the treatment, with significant improvement in symptoms like diarrhea and abdominal pain typically observed within 3–5 days. However, the exact response time may vary depending on the severity of the infection and the patient’s overall health. Always complete the prescribed course of nitazoxanide 500mg to ensure full eradication of the parasite and to prevent recurrence of the infection.