Calcium acetate 667 mg is an oral phosphate binder mainly used to treat high phosphorus levels (hyperphosphatemia) in patients with end-stage kidney disease who are on dialysis. It is not usually used as a routine calcium supplement. It works by binding phosphorus from food in the stomach and intestines, so less phosphorus is absorbed into the blood and more is removed in the stool. It should be taken with meals for best effect.  

The common side effects include high calcium levels, nausea, vomiting, and constipation, while rare side effects may include weakness, confusion, itching, rash, allergic reaction, and irregular heartbeat if calcium becomes too high.  

It should not be used in people with high calcium levels and should be used carefully in people taking digoxin, calcium supplements, or calcium-containing antacids. During pregnancy, it should be used only if advised by a doctor because safety data is limited. There is no standard RDA for calcium acetate, as it is a prescription medicine, but each 667 mg tablet/capsule provides about 169 mg elemental calcium. 

Calcium Acetate 667 mg is an oral phosphate binder used to treat high phosphate levels in chronic kidney failure patients on dialysis.

More Common  

1. High calcium levels  
2. Nausea  
3. Vomiting  
4. Constipation        

Less Common 

1. Loss of appetite  
2. Weakness  
3. Confusion  
4. Dizziness  
5. Itching  
6. Skin rash  
7. Allergic reaction  
8. Irregular heartbeat    

1. Take Calcium Acetate 667mg exactly as prescribed by your doctor, regularly at the same time each day. 
2. Do not stop taking Calcium Acetate 667mg without your doctor’s approval, even if you feel better. 
3. If you forget to take Calcium Acetate 667mg, take it as soon as you remember, unless it’s almost time for the next one, then just skip it.

Calcium acetate is a phosphate binder. It works by binding with phosphorus from food in the stomach and intestines, so the phosphorus is not absorbed into the blood. This phosphorus is then removed from the body through the stool, which helps lower high phosphate levels in patients with kidney disease on dialysis. 

Avoid taking Calcium Acetate 667mg with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal: 

Calcium acetate should be taken after meals, because it works by binding phosphorus from the food you eat. It may not work properly if taken without food. 

1. Calcium Acetate 667mg should be stored at room temperature  
2. Keep away from sunlight and moisture  
3. Keep away from the reach of children 

Daily dose

Take Calcium Acetate 667mg exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor. 

Missed Dose

If you forget to take your medicine, take the medication soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage. 

Calcium acetate

1 tablet/capsule of Calcium Acetate 667 mg provides about 169 mg elemental calcium.  

Calcium sources include milk, curd, cheese, paneer, yogurt, sesame seeds, ragi, almonds, tofu, spinach, and small fish with bones. 

What are the uses of Calcium Acetate 667mg? 

Calcium Acetate 667mg tablet is a phosphate binder medicine used to lower high phosphorus levels in the blood in people with kidney disease who are on dialysis. It helps control hyperphosphatemia and reduces complications caused by excess phosphorus. 

How does Calcium Acetate 667mg work? 

Calcium Acetate 667mg is a phosphate binder. It works by binding with phosphorus from food in the stomach and intestines, so the phosphorus is not absorbed into the blood. This phosphorus is then removed from the body through the stool, which helps lower high phosphate levels in patients with kidney disease on dialysis.

What are the side effects of Calcium Acetate 667mg? 

Calcium Acetate 667mg can commonly cause high calcium levels, nausea, vomiting, and constipation. In some people, it may also cause loss of appetite, weakness, dizziness, confusion, itching, skin rash, or allergic reaction. If calcium levels become too high, it can rarely lead to irregular heartbeat, which needs medical attention. 

1. Calcium Acetate (Oral Route) Description and Brand Names – Mayo Clinic [Internet]. Mayoclinic.org. 2021. Available from 
2. Calcium acetate [Internet]. go.drugbank.com. Available from 
3. Draft Guidance on Calcium Acetate [Internet]. [cited 2026 Mar 27]. Available from