FOSRENOL- lanthanum carbonate tablet, chewable 
FOSRENOL- lanthanum carbonate powder 
Takeda Pharmaceuticals America, Inc.


FOSRENOL® (foss-wren-all)
(lanthanum carbonate)

Read this Medication Guide before you start taking FOSRENOL and each time you get a refill. There may be new information. This information does not take the place of talking to your healthcare provider about your medical condition or treatment.

What is the most important information I should know about FOSRENOL?

FOSRENOL may cause a bowel blockage, a hole in the bowel, or severe constipation, which can be serious, and sometimes lead to surgery or treatment in a hospital.

Do not swallow FOSRENOL Chewable Tablets whole. Chew tablets completely before swallowing. If you cannot chew tablets completely, you may crush the tablets thoroughly before swallowing or discuss the oral powder formulation with your healthcare provider.


FOSRENOL is a prescription medicine used in people with end-stage renal disease (ESRD) to lower the amount of phosphate in the blood.

Who should not take FOSRENOL?

Do not take FOSRENOL if you:

FOSRENOL has not been studied in children and adolescents under 18 years of age.

What should I tell my healthcare provider before taking FOSRENOL?

FOSRENOL may not be right for you. Before starting FOSRENOL, tell your healthcare provider if you:

Especially tell your healthcare provider if you take:

Know the medicines you take. Keep a list of them and show it to your healthcare provider and pharmacist when you get a new medicine.

How should I take FOSRENOL?

What are possible or reasonably likely side effects of FOSRENOL?

See "What is the most important information I should know about FOSRENOL?"

The most common side effects of FOSRENOL include:

Tell your healthcare provider if you have any side effect that bothers you or that does not go away.

These are not all the side effects of FOSRENOL. For more information, ask your healthcare provider or pharmacist.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

How should I store FOSRENOL?

Keep FOSRENOL and all medicines out of the reach of children.

General information about FOSRENOL

Medicines are sometimes prescribed for purposes other than those listed in a Medication Guide. Do not use FOSRENOL for a condition for which it was not prescribed. Do not give FOSRENOL to other people, even if they have the same condition. It may harm them.

This Medication Guide summarizes the most important information about FOSRENOL. If you would like more information, talk with your healthcare provider. You can ask your pharmacist or healthcare provider for information about FOSRENOL that is written for healthcare professionals.

For more information go to or call 1-800-828-2088.

What are the ingredients in FOSRENOL?

Active ingredient: lanthanum carbonate

Inactive ingredients: colloidal silicon dioxide NF, dextrates (hydrated) NF, and magnesium stearate NF.

This Medication Guide has been approved by the US Food and Drug Administration.

FOSRENOL® and the FOSRENOL Logo® are registered trademarks of Shire International Licensing BV.
© 2020 Takeda Pharmaceuticals U.S.A., Inc. All rights reserved.

Distributed by:
Takeda Pharmaceuticals America, Inc.
Lexington, MA 02421

Issued [8/2020]

Revised: 12/2023
Takeda Pharmaceuticals America, Inc.