Antibiotics like rifaximin remain the first-line treatment for SIBO, eradicating overgrowth in 60-70% of cases, while probiotics serve as adjuncts or alternatives with 25-63% efficacy alone.
Direct Comparison
Antibiotics rapidly reduce bacterial load via breath test normalization (e.g., rifaximin 64% vs. other antibiotics 41%), outperforming probiotics in speed and primary eradication. Probiotics (e.g., Lactobacillus casei, Saccharomyces boulardii) achieve 62.8% decontamination rates and better symptom relief when combined with antibiotics, reducing relapse and side effects like diarrhea.
Pros and Cons
| Treatment | Eradication Rate | Symptom Relief | Recurrence Risk |
|---|---|---|---|
| Antibiotics Alone | 60-70% | Moderate-fast | High (45%) |
| Probiotics Alone | 24-63% | Gradual | Variable |
| Combined | 80-93% | Superior | Lower |
Guidelines recommend antibiotics for symptomatic SIBO, with probiotics for maintenance or PPI users. Consult a doctor for strain-specific choice, as some probiotics worsen symptoms.
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