What is this medication?
FOSRENOL (Lanthanum) is indicated for reduction of serum phosphorous absorption in the body.
How does this medication work?
FOSRENOL (Lanthanum) dissolves into lanthanum ions (La3+) in the upper gastrointestinal tract, which bind dietary phosphate ions. They form insoluble lanthanum phosphate complexes that are insoluble and excreted through the feces, thereby resulting in a net decrease in serum phosphate and calcium levels.
How should I take this medication?
Oral: Take 1,500 – 4500 mg daily divided and taken with or immediately after meals.
How to Take: Administer with or immediately after meals. Chewable tablet should be chewed completely prior to swallowing. Tablet may be crushed to aid in chewing. Unchewed or incompletely chewed tablets may cause serious GI complications. For oral powder sprinkle powder on a small quantity of applesauce or other similar food (not liquid) and administer immediately. Do not store for future use.
Note: Consider separating administration of oral medications from lanthanum when reduced bioavailability would significantly affect the concomitant medication’s safety or efficacy.
What should I watch for while using this medication?
Before starting FOSRENOL (Lanthanum), make sure your physician is aware of any allergies or medications you currently take, if you have a biliary obstruction, gastrointestinal disease, hepatic impairment, if you have a bowel obstruction, fecal impaction, are pregnant, or breastfeeding. Lanthanum use has been associated with rare but serious adverse events such as GI obstruction/fecal impaction.
What if I miss a dose?
If you miss a dose of medication, try to take it as soon as possible. However, if it is almost time for your next dose, take only that scheduled dose. Do not take double or extra doses.
How should I store this medication?
Keep out of the reach of children at all times. Store at room temperature, 59 to 86° F (15 to 30° C). Protect from light. Keep the container tightly closed. Properly dispose of any unused medication after the expiration date.
What are the possible side effects of using this medication?
Diarrhea, nausea, vomiting, abdominal pain, hypocalcemia.
Note this is not a complete list of side effects for FOSRENOL (Lanthanum), only common ones.