Generally well tolerated; mild gas or bloating may occur initially and usually settles. Seek medical advice before use if you have a weakened immune system, a serious underlying illness, or a central venous catheter. If diarrhoea is severe, bloody, or lasts more than a couple of days, or is accompanied by high fever or signs of dehydration, see a healthcare provider promptly. Oral rehydration is also important. Tell your doctor if pregnant or breastfeeding. Store as directed on the pack (some probiotics require cool storage). This product information is for general guidance only and does not replace professional medical advice. Always consult a qualified healthcare provider before starting any new medication or supplement. Keep all medicines out of reach of children.