Evaluation of the Safety of Lubiprostone in Pediatric Subjects Aged ≥ 6 Years to < 18 Years With Functional Constipation

To assess the long-term safety and tolerability of oral lubiprostone 12 or 24mcg capsules
dosed twice daily (BID) when administered orally for 24 weeks in pediatric subjects with
functional constipation. Evaluation of lubiprostone safety and tolerability is the primary
objective in this study.

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 subject 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