---
title: Buy Calcium Carbonate 500mg Tablets Online
description: Calcium Carbonate supplements support bone health and treat acid indigestion. Order verified quality calcium tablets.
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  - name: 500mg x 60 pills
    price: 51.99
  - name: 500mg x 90 pills
    price: 71.28
---

# Buy Calcium Carbonate 500mg Tablets Online

Calcium Carbonate is a mineral supplement that provides essential calcium for bone health and also serves as an antacid for heartburn relief. It is used to prevent osteoporosis, treat calcium deficiencies, and relieve acid indigestion symptoms. This supplement is designed for adults seeking to support bone density or manage occasional heartburn. Our pharmacy offers Calcium Carbonate in convenient 500mg tablet form for easy supplementation.

## Pricing and Options

| Dosage | Pack Size | Price (USD) | Price Per Pill | Status |
| :--- | :--- | :--- | :--- | :--- |
| **500mg** | 60 pills | **$51.99** | $0.87 | In Stock |
| **500mg** | 90 pills | **$71.28** | $0.79 | In Stock |


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## Introduction

Calcium Carbonate is a widely used oral calcium supplement and antacid available as a 500 mg pill. The active ingredient is calcium carbonate, which provides elemental calcium essential for bone health, muscle function, and normal nerve transmission. It belongs to the therapeutic class of calcium salts and is commonly employed to treat or prevent calcium deficiency, support bone mineral density, and relieve occasional heartburn or acid indigestion. Secondary uses include serving as a phosphate binder in chronic kidney disease management.

## Quick Reference Facts

**Active Ingredient** 
: Calcium Carbonate 

**Form** 
: pill 500 mg 

**Primary Uses** 
: • Calcium supplementation for bone health 
 • Antacid for relief of heartburn and acid indigestion 
 • Phosphate binder in chronic kidney disease 

## What is Calcium Carbonate?

Calcium Carbonate is the generic version of medications containing the active compound calcium carbonate. It is marketed under brand names such as **Tums** and **Caltrate**, among others. The product is manufactured by multiple pharmaceutical companies worldwide and is sold as an over-the-counter dietary supplement. As a generic, it offers the same therapeutic effect as brand-name equivalents while typically costing less.

## How Calcium Carbonate Works

Calcium carbonate supplies elemental calcium, a mineral that participates in the formation and maintenance of hydroxyapatite crystals in bone. When ingested, calcium carbonate dissociates in the acidic environment of the stomach, releasing calcium ions that are absorbed primarily in the duodenum. The antacid effect arises because calcium carbonate neutralizes gastric acid through a simple acid-base reaction, raising the pH of stomach contents and providing rapid symptom relief. In patients with chronic kidney disease, calcium carbonate binds dietary phosphate in the gastrointestinal tract, forming insoluble calcium-phosphate complexes that are excreted, thereby lowering serum phosphate levels.

## Conditions Treated with Calcium Carbonate

- **Calcium deficiency (hypocalcemia)** - Restores normal serum calcium levels, supporting neuromuscular function and preventing tetany. 
- **Osteopenia and osteoporosis** - Provides the calcium needed for bone remodeling, helping to maintain bone mineral density and reduce fracture risk. 
- **Heartburn, acid indigestion, and upset stomach** - Neutralizes excess gastric acid, offering quick relief of discomfort. 
- **Hyperphosphatemia in chronic kidney disease** - Binds dietary phosphate, decreasing its absorption and helping to control serum phosphate concentrations.

## Is Calcium Carbonate the Right Medication for You?

Calcium Carbonate is appropriate for adults who need additional calcium to meet dietary recommendations, especially those at risk for bone loss such as post-menopausal women, older men, or individuals with limited dairy intake. It is also suitable for occasional use as an antacid when heartburn occurs infrequently. The medication is less appropriate for people with known hypercalcemia, active kidney stones composed of calcium, severe renal impairment, or a history of hypersensitivity to calcium salts. In such cases, alternative calcium sources or different therapeutic strategies should be considered.

## Buying Calcium Carbonate from [our online pharmacy](https://liabilis.com/order-calcium-carbonate-online-en.html)

### Why Choose Our Service?

Accessing Calcium Carbonate at an affordable price can be challenging when brand-name products dominate pharmacy shelves. [our online pharmacy](https://liabilis.com/order-calcium-carbonate-online-en.html) offers a convenient, cost-effective way to obtain the generic formulation, helping you maintain your calcium regimen without unnecessary expense.

### Quality & Safety Assurance

We partner with licensed international pharmacies to ensure quality and authenticity. Every batch of Calcium Carbonate is sourced from reputable manufacturers that comply with recognized regulatory standards, providing you with a product that meets stringent safety criteria.

### Pricing & Access

Because Calcium Carbonate is available as a generic, the price is typically close to the manufacturer’s baseline cost, delivering significant savings compared with brand equivalents such as Tums or Caltrate. This makes long-term supplementation more financially sustainable.

### Discreet Delivery

Orders are packaged in unmarked, tamper-evident containers and shipped via express delivery, usually arriving within 7 days, or by standard airmail in approximately 3 weeks. Your privacy is protected throughout the process.

## Use: Dosing, Missed Dose, Overdose

- **Standard dosing** - Adults commonly take one 500 mg tablet two to three times daily with meals, providing 200 mg elemental calcium per tablet. Do not exceed the recommended daily elemental calcium intake (generally 1,000-1,200 mg) unless directed by a healthcare professional. 
- **Missed dose** - If you forget a dose, take it as soon as you remember unless it is near the time of the next scheduled dose; in that case, skip the missed tablet and continue with your regular schedule. Do not double-dose. 
- **Overdose** - Symptoms of calcium excess include nausea, vomiting, constipation, abdominal pain, and excessive thirst. Severe hypercalcemia may cause irregular heartbeat, confusion, or kidney dysfunction. Seek immediate medical attention if you suspect an overdose. 
- **Practical precautions** - Calcium carbonate should be taken with food to enhance absorption and reduce gastrointestinal irritation. Avoid taking it simultaneously with iron supplements, certain antibiotics (e.g., tetracyclines, fluoroquinolones), bisphosphonates, levothyroxine, or other medications that require an empty stomach, as absorption may be impaired. Operating heavy machinery is not contraindicated, but be aware that severe hypercalcemia can cause dizziness.

## Safety Information

### ⚠️ Who Should Not Take Calcium Carbonate

- Documented hypercalcemia or hypercalciuria 
- History of calcium-containing kidney stones 
- Severe renal impairment (eGFR < 30 mL/min/1.73 m²) without medical supervision 
- Known hypersensitivity to calcium carbonate or any excipients in the tablet 

### Common Side Effects

- Constipation (most frequent) 
- Bloating or gas 
- Mild abdominal discomfort 

These effects are usually transient and can be mitigated by increasing fluid intake, dietary fiber, or adjusting the dosing schedule.

### Serious Side Effects (Seek Immediate Medical Help)

- Signs of hypercalcemia: persistent nausea, vomiting, excessive thirst, frequent urination, confusion, muscle weakness, or irregular heartbeat 
- Severe allergic reaction: rash, itching, swelling of the face or throat, difficulty breathing 

If any of these occur, discontinue the product and obtain urgent medical care.

### Drug & Food Interactions

- **Antibiotics (tetracyclines, fluoroquinolones)** - Calcium chelates these agents, reducing their absorption; separate dosing by at least 2 hours. 
- **Bisphosphonates** - Calcium interferes with oral bisphosphonate uptake; take bisphosphonates with plain water at least 30 minutes before calcium. 
- **Levothyroxine** - Calcium decreases levothyroxine absorption; separate administration by at least 4 hours. 
- **Iron supplements** - Calcium impairs iron absorption; stagger dosing by at least 2 hours. 
- **Vitamin D** - Co-administration enhances calcium absorption and is often recommended for optimal bone health. 

## Off-Label and Investigational Uses of Calcium Carbonate

Calcium carbonate is sometimes employed off-label for managing mild gastro-esophageal reflux during pregnancy, where clinicians seek a non-prescription antacid with a favorable safety profile. Small observational studies suggest it can reduce heartburn frequency without adverse fetal outcomes, but formal regulatory approval for this indication is lacking. Additionally, some dermatologists use calcium carbonate as a topical absorbent in certain wound-care dressings, though evidence remains limited. Off-label use should only be considered under the direct supervision of a qualified healthcare provider.

## Storage & Handling

- Store tablets at room temperature (15 °C-30 °C) in a dry place, away from direct sunlight and moisture. 
- Keep the container tightly closed to protect from humidity. 
- Do not use the product after the expiration date printed on the label. 
- Dispose of unused tablets according to local regulations; many pharmacies accept expired medications for safe disposal.

## Frequently Asked Questions

**Practical Use & Lifestyle**

- **Can I take Calcium Carbonate while traveling across time zones?** 
 Yes. Maintain your usual dosing interval based on local time, and continue to take the tablets with meals to ensure consistent absorption.

- **Will Calcium Carbonate interact with calcium-rich foods like dairy?** 
 Calcium from food adds to the elemental calcium you receive from the supplement; this is generally beneficial for meeting daily requirements, but avoid excessive total calcium intake.

- **Is it safe to use Calcium Carbonate during pregnancy?** 
 Calcium carbonate is classified as pregnancy category A by most health agencies when used at recommended doses, but you should discuss any supplementation with your obstetric provider.

- **Can I split a 500 mg tablet in half?** 
 Tablets are not scored, so splitting may result in uneven dosing. Use a tablet cutter if a lower dose is needed, or obtain a formulation with the appropriate strength.

**Product Information**

- **What do Calcium Carbonate tablets look like?** 
 Generic 500 mg tablets are typically white, round, and uncoated, though appearance can vary slightly between manufacturers.

- **Are there any inactive ingredients I should be aware of?** 
 Common excipients include microcrystalline cellulose, magnesium stearate, and silicon dioxide. Check the product label for a complete list if you have known sensitivities.

**Safety & Regulations**

- **Will Calcium Carbonate show up on a drug test?** 
 Calcium carbonate is a mineral supplement and is not screened for in standard occupational or sports drug-testing panels.

- **Are there age restrictions for purchasing Calcium Carbonate online?** 
 Our platform sells Calcium Carbonate only to adults (18 years or older) who can legally enter into a purchase agreement.

- **How does Calcium Carbonate affect kidney stone risk?** 
 In individuals prone to calcium-oxalate stones, high calcium intake from supplements may increase stone formation; however, calcium taken with meals can bind oxalate in the gut and potentially reduce absorption. Discuss personal risk with a healthcare professional.

**Scientific & Clinical Curiosity**

- **When was Calcium Carbonate first introduced as a supplement?** 
 Calcium carbonate has been used for centuries as an antacid and dietary calcium source, with modern pharmaceutical formulations emerging in the mid-20th century.

- **How does Calcium Carbonate compare to calcium citrate?** 
 Calcium carbonate provides more elemental calcium per tablet but requires an acidic environment for optimal absorption, whereas calcium citrate is better absorbed on an empty stomach and may be preferred for patients with reduced stomach acid.

## Glossary

**Elemental Calcium** 
: The actual amount of calcium ion available for absorption after a calcium salt (such as calcium carbonate) is digested. 

**Phosphate Binder** 
: A medication that binds dietary phosphate in the gastrointestinal tract, reducing its absorption and lowering serum phosphate levels. 

**Hypercalcemia** 
: An abnormally high concentration of calcium in the blood, which can cause neurological, cardiovascular, and renal complications. 

**Bioavailability** 
: The proportion of an administered dose that reaches systemic circulation in an active form. 

**Antacid** 
: A substance that neutralizes stomach acid, providing relief from heartburn and indigestion.

## Disclaimer

The information provided about **Calcium Carbonate** is for general knowledge only. It does not replace professional medical consultation. All treatment decisions, including those regarding off-label use, should be made under the supervision of a qualified healthcare provider. We assume all readers are responsible adults capable of making informed decisions about their health. [our online pharmacy](https://liabilis.com/order-calcium-carbonate-online-en.html) offers access to **Calcium Carbonate** for individuals who may have limited availability through traditional pharmacies, prescription-based insurance schemes, or who are seeking affordable generic alternatives. Always consult your doctor before starting, changing, or discontinuing any medication.