Lanfos
Generic: Lanthanum Carbonate
Daily Dose:
Duration:
Cheaper & Alternative Brands (250 mg)
Same active generic (Lanthanum Carbonate), same form (Chewable Tablet), exact same strength (250 mg)No other brands currently registered with this exact active generic and dosage form.
Clinical Prescribing Information
Medical monograph and safety information for healthcare professionals & patients.Indications & Clinical Uses
Lanfos is a phosphate binder indicated to reduce serum phosphate in patients with end-stage renal disease (ESRD).
Dosage & Administration
The recommended initial total daily dose of Lanthanum Carbonate is 1,500 mg in divided doses. Titrate every 2 to 3 weeks based on serum phosphate level. Take Lanthanum Carbonate with or immediately after meals.
Lanthanum Carbonate Chewable Tablets: Do not swallow tablets whole. Chew or crush tablet completely before swallowing.
Contraindications
Contraindicated in bowel obstruction, including ileus and fecal impaction.
Side Effects & Adverse Reactions
The most common adverse reactions for Lanfos were gastrointestinal events, such as nausea, vomiting, and abdominal pain and they generally abated over time with continued dosing. The following adverse reactions have been identified during post-approval use of Lanfos constipation, dyspepsia, allergic skin reactions, and tooth injury while chewing the tablet.
Warnings & Precautions
Gastrointestinal Adverse Effects: Serious cases of gastrointestinal obstruction, ileus, subileus, gastrointestinal perforation, and fecal impaction have been reported in patients taking Lanfos, some requiring surgery or hospitalization. During treatment with Lanfos, physicians and patients should remain vigilant for signs and symptoms of gastrointestinal disorders, especially constipation and abdominal pain/distention, which may indicate bowel obstruction, ileus, or subileus. Treatment with Lanfos should be re-evaluated in patients who develop severe constipation or other severe gastrointestinal signs and symptoms. Advise patients who are prescribed Lanfos Chewable Tablets to chew the tablet completely and not to swallow them whole. Serious gastrointestinal complications have been reported in association with unchewed or incompletely chewed tablets.
Pharmacology & Mechanism of Action
Lanthanum Carbonate is a phosphate binder that reduces absorption of phosphate by forming insoluble Lanthanum phosphate complexes that pass through the Gl tract unabsorbed. Both serum phosphate and calcium phosphate product are reduced as a consequence of the reduced dietary phosphate absorption.
In vitro studies have shown that Lanthanum binds phosphate in the physiologically relevant pH range of 3 to 7. In simulated gastric fluid, Lanthanum binds approximately 97% of the available phosphate at pH 3-5 and 67% at pH 7, when Lanthanum is present in a two-fold molar excess to phosphate. Bile acids have not been shown to affect the phosphate binding affinity of Lanthanum. In order to bind dietary phosphate, Lanthanum Carbonate must be administered with or immediately after meals.