Diarrhea with Flatulence: Causes, Symptoms, and Management
Diarrhea with excessive gas (flatus) suggests fermentative or secretory processes in the gut.
Common Causes
- Infectious: Viral (norovirus, rotavirus), bacterial (C. difficile, Salmonella, Campylobacter), parasitic (Giardia).
- Dietary: Lactose intolerance, fructose malabsorption, sugar alcohols (sorbitol, xylitol), high-FODMAP foods.
- Functional: IBS-D (diarrhea-predominant IBS).
- Medications: Antibiotics (C. diff risk), metformin, magnesium, PPIs.
- Malabsorption: Celiac disease, pancreatic insufficiency, SIBO.
Management
- Hydration: ORS (oral rehydration solution) for losses.
- Diet: BRAT (banana, rice, applesauce, toast) short-term; low-FODMAP if recurrent.
- Probiotics: S. boulardii, L. rhamnosus GG evidence-supported.
- Antimotility agents (loperamide) only if no fever/blood; avoid in C. diff.
- See a clinician if >48 hours, fever >38.5°C, blood/mucus, signs of dehydration, or recent antibiotics/travel.
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