['constipation - functional']
['lubiprostone']

        Inclusion Criteria:

          -  Medically-confirmed diagnosis of Functional Constipation per Rome III Diagnostic
             Criteria for Childhood Functional Constipation

          -  At least 6 years of age but less than 18 years of age at the time of randomisation

          -  Only stable dose of selective serotonin re-uptake inhibitors (SSRIs),
             serotonin-specific reuptake inhibitor (SNRIs), or monoamine oxidase inhibitors (MAO)
             inhibitors are allowed if participant is taking antidepressants

        Exclusion Criteria:

          -  Any gastrointestinal (GI) condition, other than constipation, affecting GI motility or
             defecation

          -  Untreated faecal impaction at the time of screening

          -  Medical/surgical condition that might interfere with the absorption, distribution,
             metabolism, or excretion of the study medication
      