Due to COVID-19 and great challenges during patient enrolment period, current status of this study is far behind the plan. The study cannot be completed according to the plan. Sanofi decides to terminate the study upon comprehensive assessment.

Primary Objective:

Explore the efficacy of teicoplanin (100-200 mg administered orally twice a day for 7 to 14 days) in patients with Clostridium difficile infection-associated diarrhea and colitis

Secondary Objective:

Evaluate the safety of teicoplanin in patients with Clostridium difficile infection-associated diarrhea and colitis

Approximate 10 weeks

Inclusion criteria :

• Signed Informed Consent.
• Male or female no less than 18 years of age.
• Inpatient with a diagnosis of mild-moderate or severe CDAD (first occurrence or first recurrence within 3 months) with: Diarrhea: a change in bowel habits with > 3 liquid or unformed bowel movements (UBM) within 24 hours prior to enrollment, AND Positive C. difficile toxin test on a stool sample produced within 72 hours prior to enrollment.

Exclusion criteria:

• More than one previous episode of CDAD in the 3-month period prior to enrollment.
• Evidence of life-threatening or fulminant CDAD.
• Likelihood of death within 72 hours from any cause.
• History of inflammatory colitides, chronic abdominal pain, or chronic diarrhea
• Antimicrobial treatment active against CDAD administered for > 24 hours except for metronidazole treatment failures (MTF).
• Known hypersensitivity or contraindication to teicoplanin.
• Pregnant or nursing females.
• Unable or unwilling to comply with all protocol requirements.
• Any circumstances or conditions, which, in the opinion of the investigator, may affect full participation in the study or compliance with the protocol.

The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.

Qualified researchers may request access to patient level data and related study documents including the clinical study report, study protocol with any amendments, blank case report form, statistical analysis plan, and dataset specifications. Patient level data will be anonymized and study documents will be redacted to protect the privacy of trial participants. Further details on Sanofi's data sharing criteria, eligible studies, and process for requesting access can be found at: https://vivli.org