Fosrenol

(lanthanum)

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Lowers phosphate levels.

Skip Upsides & Downsides section. Skip to side effects section.

Our bottom line

Fosrenol (lanthanum) works well to lower blood phosphate levels without affecting blood calcium levels in people with advanced kidney disease, but it can be expensive, and you need to take it with meals.

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    $349.85
Quick facts about Fosrenol
  • Drug class: Renal
  • Rx status: Prescription only
  • Generic status: No lower cost generic available

Upsides

  • Works as well as other phosphate binders to lower blood phosphate levels.
  • Easy to take since Fosrenol (lanthanum) comes in powder form, and the tablet form can be crushed or chewed.
  • Is calcium-free, which means Fosrenol (lanthanum) doesn't come with the risk of high calcium levels like some alternative medicines.
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What to expect from Fosrenol, on one page

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Downsides

  • Like other phosphate binders, Fosrenol (lanthanum) must be taken with meals.
  • Is more expensive than other phosphate binders.
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What to expect from Fosrenol, on one page

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How it works

Fosrenol (lanthanum) is a phosphate binder. It binds to the phosphates in your food before they can be absorbed, which lowers phosphate levels to help protect your kidneys and bones.

Quick facts about Fosrenol
  • Drug class: Renal
  • Rx status: Prescription only
  • Generic status: No lower cost generic available

Used for

  • Hyperphosphatemia in advanced kidney disease

Dosage forms

  • Pill
  • Powder
Tried Fosrenol? Write a review!

Prices and coupons

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What to expect when you take Fosrenol (lanthanum) for Hyperphosphatemia in end-stage renal disease

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  • First few hoursHours
    First few daysDays
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  • Effectiveness
  • Starts to kick in
    Full effects
  • First few hoursHours
    First few daysDays
    First few weeksWeeks
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  • Possible side effects
  • Nausea
  • Vomiting
  • Diarrhea
  • Stomach pain
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Side effect rates for Fosrenol (lanthanum)

From 275 clinical trials of Fosrenol when taken for hyperphosphatemia in end-stage renal disease
  • Nausea
    11%11%
    5%5%
  • Vomiting
    9%9%
    4%4%
  • Stomach pain
    5%5%
0%
10%
20%
30%
40%
50%
60%
70%
80%
Where we got our data »

The placebo bar shows how common a side effect was for people taking a sugar pill instead of Fosrenol.

Fosrenol (lanthanum)
Placebo

People taking Fosrenol felt side effect more

People taking Fosrenol felt side effect less

No difference

Risks and Warnings for Fosrenol (lanthanum)

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    • Higher risk if:
    • History of changes to your digestive tract's anatomy
    • History of digestive tract problems
    • Taking medicines that can also cause blockage

    Fosrenol (lanthanum) can cause blockage of the stomach, intestines, or rectum, which can be very dangerous. The risk is higher if you have a history of changes to your digestive tract's anatomy, constipation problems, or are taking medicines that can also cause blockage. Ask your doctor if Fosrenol (lanthanum) is right for you.

Common concerns from people taking Fosrenol (lanthanum)

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Interactions
  • Fosrenol (lanthanum) interacts with compounds that contain aluminum, magnesium, or calcium. Talk to your doctor or pharmacist about how to space your medicines, including over-the-counter products and supplements, throughout the day.
Food
  • Knowing which foods to eat or avoid can help if you have high phosphate levels. Your doctor may recommend a low phosphate diet. Ask your doctor which type of diet is best for you.