If you have kidney disease, your doctor might have told you that your blood phosphate level is too high. To help control this, your doctor may have given you a special medicine called lanthanum carbonate. This medicine is often known by the brand name Fosrenol. Let us take a close look at this important medicine, how to use it safely, and what things you need to watch out for.
Living with kidney health challenges means paying close attention to what you eat and the medicines you take every day. Understanding how lanthanum carbonate helps your body keeps you in control of your health journey. Read on to learn everything you need to know in simple, clear terms.
Key Takeaways
- Lanthanum carbonate is a binder that attaches to extra phosphate in your food.
- You must chew the tablets completely before swallowing. Never swallow them whole.
- Always take your dose right during or right away after your meals.
- Tell your doctor about all other medicines you take to avoid bad mix-ups.
- Keep taking your medicine unless your doctor tells you to stop.
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What This Medicine Actually Does
Simply put, this medicine is a binder. Think of it like a tiny magnet inside your gut. When you eat food, the food has a chemical in it called phosphate.
Before that phosphate can pass from your gut into your blood, this medicine goes in and grabs the phosphate bits. Then, your body passes those bound phosphate bits out naturally in your stool so they do not enter your bloodstream.
When your kidneys do not work very well, they cannot filter out extra waste and minerals like phosphate. When phosphate piles up in your blood, it weakens your bones, causes joint pain, and can harm your heart and blood vessels. Taking this medicine stops that dangerous buildup from happening.
Things to Tell Your Doctor Before Starting This Medicine
Before you start taking this medicine, you must tell your doctor if you have any health conditions. This information helps your doctor decide if this medicine is safe and right for you.
| Your Health Condition | Why It Matters |
|---|---|
| Bowel blockage or severe constipation | This medicine can cause constipation, so existing blockages could get worse. |
| Preparing for an X-ray of your stomach | The ingredients in these tablets can show up on X-rays and affect test results. |
| Stomach bleeding or gut diseases | Your doctor needs to monitor you closely if you have active gut inflammation. |
| Allergies to medicines or foods | You must check if you are sensitive to lanthanum or any inactive ingredients. |
| Pregnancy or planning to get pregnant | Your doctor must weigh the safety risks during pregnancy with you. |
| Breastfeeding a baby | It is important to know if the medicine passes into breast milk. |
The Correct Way to Take This Medicine
This is not a regular pill that you just swallow with water. Because of that, you need to know the right way to take it every single time.
- Chew your tablets well: This is a chewable tablet. Never swallow the tablet whole with water. Put the tablet in your mouth, chew it completely until it is crushed, and then swallow.
- Take it with meals: Always take this medicine right when you start eating or while you are eating your meal. This lets the medicine mix with your food to catch the phosphate properly.
- Space out other medicines: If you take other pills like thyroid or blood pressure medicine, you may need a gap of a few hours between them. Show all your medicines to your doctor to get the exact timing right.
- Do not stop on your own: Even if you feel fine, do not stop taking this medicine unless your doctor tells you to do so.
Important: This medicine was prescribed just for you. Even if someone else has similar kidney issues, never share your medicine with them.
What to Do If You Miss a Dose or Take Too Much
If You Miss a Dose
If you forget to take your medicine, take it as soon as you remember. However, if it is almost time for your next meal and dose, skip the missed dose completely. Just take your next dose at the normal scheduled time. Never take two doses at the exact same time to make up for a missed one.
If You Take Too Much
If you think you took too much of this medicine, get help right away. Call your local emergency number or go to the nearest hospital emergency department right away.
Other Medicines That Can Clash With This Medicine
Lanthanum carbonate can change how other medicines work in your body. Because of this, telling your doctor about every single product you take is vital.
| Medicine Group | Examples |
|---|---|
| Certain antibiotics | Ampicillin, quinolones, tetracyclines |
| Blood pressure and heart pills | Specific prescription heart medicines |
| Cholesterol-lowering medicines | Atorvastatin, lovastatin, simvastatin |
| Thyroid hormone pills | Levothyroxine |
| Malaria prevention medicines | Specialized doctor-prescribed drugs |
This list is not complete. Always mention any vitamins, herbal supplements, or over-the-counter products you use to your doctor or pharmacist.
Possible Side Effects You Might Experience
Like many medicines, lanthanum carbonate can cause side effects for some people. While many effects are mild, others need prompt medical attention.
| Side Effect Type | What to Look For |
|---|---|
| Serious Signs to Report Right Away | Allergic reactions like skin rash, itching, swelling of your lips, tongue, or face, or trouble breathing. Severe constipation that does not go away. |
| Mild Signs That May Need Watching | Mild stomach pain, nausea, vomiting, or diarrhea. Let your doctor know if these stay for a long time or bother you a lot. |
When to Call Emergency Services
Call 911 (US/Canada) or 999 (UK) or go to your nearest Emergency Department right away if you experience sudden trouble breathing, swelling of your face or throat, or severe abdominal pain with vomiting.
💡 Take-Home Message
- Lanthanum carbonate is a chewable tablet that you must chew completely into a powder before swallowing.
- Always take this medicine right along with your meals to catch food phosphate.
- Tell your doctor about all other medicines and supplements you use.
- Do not stop taking your medicine without talking to your doctor first.
- Watch out for severe constipation or allergic signs, and contact your doctor if they happen.
- Attend your clinic visits regularly and complete your required blood tests to keep your treatment on track.
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