The investigators aim to find out whether VSL#3 can prevent Antibiotic associated diarrhoea and Clostridium Difficile associated diarrhoea when VSL#3 is giving during a course of systemic antibiotics. Patients will be randomized in a 1:1 proportion to receive either one sachet of VSL#3 or a similar looking placebo twice a day. This will be given for the length of the antibiotic course and another week thereafter. Follow-up will last until 28 days after the last antibiotic dose. Patient restarted on antibiotics during follow-up will be restarted on the trial medication and the 28 day follow-up will be recommenced.~This trial has 2 co-primary outcome measures.
The investigators aim to investigate whether the routine use of the probiotic formulation VSL#3 co-prescribed with antibiotics reduces the incidence of both Antibiotic associated diarrhoea and Clostridium Difficile associated diarrhoea.