R R

What Is Sevelamer?

Sevelamer is a prescription phosphate-binding medication used to control elevated phosphorus levels in patients with chronic kidney disease who receive dialysis. It is available as sevelamer carbonate, associated with Renvela, and sevelamer hydrochloride, associated with Renagel. Both formulations act in the digestive tract to reduce the absorption of phosphorus from food. Sevelamer does not contain calcium and is not significantly absorbed into the bloodstream. It is taken with meals and adjusted according to blood phosphorus levels. Although the formulations have similar phosphate-binding activity, their approved populations and dosage forms differ. Sevelamer does not replace dialysis or dietary phosphorus management.

Link to This Resource Page

Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.

To display this...

What Is Sevelamer?

Sevelamer is a prescription phosphate-binding medication used to control elevated phosphorus levels in patients with chronic kidney disease who receive dialysis. It is available as sevelamer carbonate, associated with Renvela, and sevelamer hydrochloride, associated with Renagel. Both formulations act in the digestive tract to reduce the absorption of phosphorus from food. Sevelamer does not contain calcium and is not significantly absorbed into the bloodstream. It is taken with meals and adjusted according to blood phosphorus levels. Although the formulations have similar phosphate-binding activity, their approved populations and dosage forms differ. Sevelamer does not replace dialysis or dietary phosphorus management.

read more about sevelamer ...

Copy this HTML:

Copy HTML Copied!

How Does Sevelamer Work?

Sevelamer is a nonabsorbed polymer that binds dietary phosphate inside the gastrointestinal tract. Its amine groups become protonated and interact with negatively charged phosphate ions, reducing the amount of phosphorus available for absorption. The bound phosphate passes through the digestive tract and leaves the body in stool. This helps lower elevated blood phosphorus in patients whose kidneys cannot adequately eliminate phosphorus. Unlike calcium-containing phosphate binders, sevelamer does not add calcium to the body. Sevelamer carbonate and sevelamer hydrochloride share the same active phosphate-binding polymer but contain different counterions. Treatment effectiveness depends on taking the medication with meals and monitoring phosphorus levels.

What Conditions Does Sevelamer Treat?

Sevelamer is used to control elevated serum phosphorus in patients with chronic kidney disease receiving dialysis. High phosphorus levels can contribute to mineral and bone disorders and abnormal calcium-phosphorus balance. Renvela, the sevelamer carbonate reference product, is approved for adults and children aged six years and older with chronic kidney disease on dialysis. Sevelamer hydrochloride products have separate labeling and should not automatically be assumed to have identical pediatric indications. Sevelamer is not a treatment for every cause of high phosphorus or low kidney function. A kidney specialist determines the need for phosphate binders using laboratory results, dietary intake, dialysis treatment, and other medications.

How Should Sevelamer Be Taken?

Sevelamer is taken orally with meals, with doses adjusted according to blood phosphorus measurements. Adults beginning sevelamer carbonate treatment commonly receive 800 mg or 1,600 mg three times daily with meals, depending on their phosphorus level. The dose may be increased by 800 mg per meal at approximately two-week intervals until the desired phosphorus level is reached. Sevelamer carbonate tablets must be swallowed whole. Its powder for oral suspension must be mixed according to the package instructions and consumed within 30 minutes. Sevelamer hydrochloride tablets have separate product instructions. Certain oral medications, including ciprofloxacin and mycophenolate, may need to be administered at different times to prevent absorption problems.

What Are the Side Effects and Warnings of Sevelamer?

Common adverse effects include nausea, vomiting, diarrhea, indigestion, abdominal pain, gas, and constipation. Serious gastrointestinal complications, including difficulty swallowing, intestinal obstruction, gastrointestinal ulcers, bleeding, and bowel perforation, have been reported. Sevelamer is contraindicated in patients with bowel obstruction. Patients with severe constipation, swallowing disorders, or significant gastrointestinal motility problems require careful evaluation before treatment. Sevelamer can reduce the absorption of certain oral medications and may lower levels of some vitamins during prolonged use. Severe abdominal pain, persistent vomiting, inability to pass stool, blood in the stool, or difficulty swallowing requires prompt medical assessment.

Common Questions About Sevelamer

Is sevelamer the same as Renvela?

Renvela contains sevelamer carbonate. Renagel contains sevelamer hydrochloride. Both act as phosphate binders, but their formulations and labeling differ.

Why must sevelamer be taken with food?

Sevelamer binds phosphorus from food inside the digestive tract. Taking it with meals allows it to reduce phosphorus absorption.

Can sevelamer treat high phosphorus without dialysis?

Its U.S. approved indications focus on controlling serum phosphorus in patients with chronic kidney disease receiving dialysis. A kidney specialist determines whether treatment is appropriate.

Can sevelamer cause constipation?

Yes. Constipation is a recognized adverse effect. Severe constipation, abdominal pain, or symptoms of bowel obstruction require medical attention.

References

DailyMed - SEVELAMER CARBONATE tablet, film coated. https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=515ae758-ccba-5758-e063-6394a90a315b. Date Accessed November 10, 2026.

Sevelamer. MedlinePlus. https://medlineplus.gov/druginfo/meds/a601248.html. Date Accessed November 10, 2026.

Sevelamer. PubMed. https://pubmed.ncbi.nlm.nih.gov/39383286/. Date Accessed November 10, 2026.

Sevelamer. StatPearls. https://www.ncbi.nlm.nih.gov/books/NBK607999/. Date Accessed November 10, 2026.

Sevelamer Carbonate. PubChem. https://pubchem.ncbi.nlm.nih.gov/compound/Sevelamer-Carbonate. Date Accessed November 10, 2026.