A Study to Assess the Pharmacokinetics of Lanthanum Carbonate, Investigate and Compare the Efficacy, Safety and Tolerability of Lanthanum Carbonate With Calcium Carbonate in Hyperphosphataemic Children and Adolescents With Chronic Kidney Disease on Dialysis

A 3-part Open-label Study to Assess the Pharmacokinetics of Lanthanum Carbonate, Compare the Efficacy, Safety and Tolerability of 8 Weeks of Treatment With Lanthanum Carbonate and Calcium Carbonate Using a Crossover Design and Investigate the Efficacy and Safety of 8 Months of Treatment With Lanthanum Carbonate in Hyperphosphataemic Children and Adolescents Aged 10 Years to <18 Years With Chronic Kidney Disease on Dialysis

The purpose of this study is to summarize the percentage of participants achieving age-specific Kidney Disease Outcomes Quality Initiative (KDOQI) targets for serum phosphorus in hyperphosphatemic children and adolescents with chronic kidney disease (CKD) who are on dialysis, following 8 weeks of treatment with lanthanum carbonate.

Inclusion Criteria:

1. Aged 10 years to less than (<) 18 years of age at the time of consent.
2. Participant or parent/legally authorized representative (LAR) understand and are able, willing, and likely to fully comply with the study procedures and restrictions defined in this protocol.
3. Male, or non-pregnant, non-lactating female who agrees to comply with any applicable contraceptive requirements of the protocol.
4. Established chronic kidney disease (CKD), on dialysis, and requires treatment for hyperphosphatemia with a phosphate binder.
5. Serum phosphorus levels after a washout period of up to 3 weeks as follows: Age <12 years: Serum phosphorus greater than (>) 6.0 mg/dL (1.94 mmol/L); Age 12 years and older: Serum phosphorus >5.5mg/dL (1.78mmol/L).
6. Ability to provide written, signed and dated (personally or via an LAR) informed consent/and assent, as applicable, to participate in the study.

Exclusion Criteria:

1. Current or recurrent disease (example [eg], cardiovascular, liver, unstable and uncontrolled gastrointestinal, malignancy, or other conditions) other than CKD or end-stage renal disease that could affect the action, absorption or disposition of the investigational product, or clinical or laboratory assessments.
2. Current or relevant history of physical or psychiatric illness, any medical disorder (except for CKD or end-stage renal disease and related co-morbidities) that may require treatment or make the participant unlikely to fully complete the study, or any condition that presents undue risk from the investigational product or procedures.
3. Unable to eat semi-solid foods or on Total Enteral Alimentation.
4. Known or suspected intolerance or hypersensitivity to the investigational product(s), closely related compounds, or any of the stated ingredients.
5. History of alcohol or other substance abuse within the last year.
6. Current use of any medication (including over-the-counter, herbal, or homeopathic preparations) that could affect (improve or worsen) the condition being studied, or could affect the action, absorption, or disposition of the investigational product(s), or clinical or laboratory assessment.
7. Weight and age of participant are outside of local applicable criteria for blood sample volume limits.
8. Use of another investigational product within 30 days prior to receiving the first dose of investigational product.