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Probiotics (Lactobacillus) Side Effects & Safety

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Safety Profile

Overall safety rating: Generally Safe

Potential Side Effects

  • Mild gas and bloating in the first few days of use (usually resolves)
  • Very rarely, bacteremia in severely immunocompromised patients
  • Histamine production by certain strains may worsen symptoms in histamine-sensitive individuals

Drug & Supplement Interactions

  • Antibiotics — take probiotics 2+ hours apart from antibiotics to avoid killing the probiotic organisms
  • Immunosuppressants — theoretical risk of infection in severely immunocompromised patients
  • Antifungals — no significant interaction

Maximum Dose

Do not exceed: 100 billion CFU/day has been used safely in clinical trials

Full Probiotics (Lactobacillus) Guide

References

  1. (). Probiotics for the prevention of Clostridium difficile-associated diarrhea in adults and children. Cochrane Database of Systematic Reviews. DOI
  2. (). Clinical trial: Lactobacillus plantarum 299v (DSM 9843) improves symptoms of irritable bowel syndrome. World Journal of Gastroenterology. DOI