Product Information
CALCIUM ANTACID 500 MG CHW TAB is a generic product labeled by Rugby Laboratories, priced at $0.0169 per EA under NDC 00536104815. Its NADAC has been published 603 times since Mar 18, 2015.
Strength
500 mg/1
Manufacturer
Rugby LaboratoriesNDC
00536104815
Classification
Generic
Dosage Form
TABLET, CHEWABLE
Route
ORAL
Effective Date
9/23/2026
Active Ingredients
CALCIUM CARBONATEApproval Type
OTC MONOGRAPH DRUG
FDA Application
M001On Market Since
12/24/2012
Pharmacological Classes
Price Statistics
The NADAC for CALCIUM ANTACID 500 MG CHW TAB has been published 603 times since Mar 18, 2015, and over the history we have for it it has held within roughly two percent of its current level. The table below summarizes its recorded NADAC range and movement.
| Current price | $0.0169 per EA |
|---|---|
| All-time high | $0.0175 (Apr 16, 2025) |
| All-time low | $0.0121 (Jul 18, 2018) |
| 52-week high | $0.0175 |
| 52-week low | $0.0168 |
| Median price | $0.0143 |
| Average price | $0.0146 |
| Largest weekly change | +18.7% (Feb 19, 2020) |
| Weeks tracked | 603 |
| Tracking since | Mar 18, 2015 |
Generic Alternatives
The matcher finds 3 manufacturers offering a NADAC-published product with this drug's active ingredient and strength in a comparable dosage form (cheapest from each manufacturer, up to 10 shown below). Switching to the cheapest would cut per-unit acquisition cost by roughly 21% at current NADAC. These are candidates to verify clinically, not guaranteed substitutes — see our generic drug prices guide.
Related Drugs
Same classification
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Manufacturer
Rugby Laboratories manufacturer profile
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Drug market
Antacid Tablets market comparison
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Therapeutic class
Blood Coagulation Factor class view
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Trend hub
Latest market trends
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Guide
Understanding NADAC pricing
Use the explainer when you need context on how CMS publishes NADAC and how to interpret the number on this page.
Frequently asked questions
What is the NADAC price of CALCIUM ANTACID 500 MG CHW TAB?
The current National Average Drug Acquisition Cost (NADAC) for CALCIUM ANTACID 500 MG CHW TAB, manufactured by Rugby Laboratories, is $0.0169 per EA (NDC 00536104815), effective Sep 30, 2026.
How has the price of CALCIUM ANTACID 500 MG CHW TAB changed over time?
Over the history we have for it, the NADAC for CALCIUM ANTACID 500 MG CHW TAB has held within roughly two percent of its current level. It has been tracked across 603 weekly CMS publications since Mar 18, 2015.
What are the highest and lowest recorded NADAC prices for CALCIUM ANTACID 500 MG CHW TAB?
Since Mar 18, 2015, the NADAC for CALCIUM ANTACID 500 MG CHW TAB has ranged from a low of $0.0121 (Jul 18, 2018) to a high of $0.0175 (Apr 16, 2025), with a median of $0.0143 per EA.
Are there cheaper alternatives to CALCIUM ANTACID 500 MG CHW TAB?
Yes. 3 manufacturers publish a NADAC-priced product with the same active ingredient and strength in a comparable dosage form. The lowest-priced option, QC ANTACID 500 MG CHEW TABLET, is $0.0134 per EA — about 21% below CALCIUM ANTACID 500 MG CHW TAB.
Who manufactures CALCIUM ANTACID 500 MG CHW TAB?
CALCIUM ANTACID 500 MG CHW TAB (NDC 00536104815) is labeled by Rugby Laboratories, and CMS classifies it as a generic product.