I'm sorry to hear that your diarrhea has persisted despite treatment. Persistent diarrhea lasting more than two weeks can be concerning and may require further evaluation.

Here are some important points and recommendations:

• Persistent Symptoms: Since your diarrhea has lasted 15 days and returned after antibiotics (Levofloxacin, Ornidazole, and Rifaximin), it suggests that the underlying cause might not be fully addressed or could be something other than a simple bacterial infection.

• Possible Causes: Causes can include infections (bacterial, viral, parasitic), inflammatory conditions, or other gastrointestinal issues. Sometimes, antibiotics can disrupt normal gut flora, leading to ongoing symptoms.

• Probiotics: A probiotic such as Gutgermina Oral Suspension (containing Bacillus clausii) may help restore the balance of intestinal bacteria and improve symptoms. However, probiotics alone may not resolve the underlying cause.

• Next Steps: It is important to consult a gastroenterologist (a specialist in digestive system disorders) promptly. They may recommend stool tests, blood tests, or other investigations to identify the cause and guide appropriate treatment.

• When to Seek Immediate Care: If you experience severe abdominal pain, high fever, blood in stools, dehydration, or weakness, seek emergency medical attention immediately.

Please arrange to see a gastroenterologist soon for a thorough evaluation and tailored treatment plan. Persistent diarrhea should not be ignored, as it can lead to complications like dehydration and nutrient deficiencies.To narrow down potential causes, we will need some more information.I understand you're concerned about your diarrhea. To give you the best advice, could you please share your age and gender?