Terminated due to insufficient efficacy over placebo in Study ATL1251/038/CL.

The main purpose of this study is to evaluate the long-term safety and tolerability of renzapride at a dose of 4 mg taken once daily for 12 months in women with constipation-predominant irritable bowel syndrome (IBS-C).

Since IBS is a chronic condition affecting patients over many years, it is anticipated that renzapride will be prescribed and used by patients on a daily basis for long periods of time. Hence the need to understand its long-term safety and tolerability in the target population. This study is open label and so all subjects will take renzapride and will know that they are taking it. Enrolment in to this study is restricted to subjects completing a 12-week, placebo-controlled study of the effectiveness of renzapride in providing relief from IBS-C (Study no. ATL1251/038/CL).

Inclusion Criteria:

• completed 12 weeks treatment in the preceding pivotal study ATL1251/038/CL

Exclusion Criteria:

• Subjects who are pregnant or breastfeeding