Who makes Kirkland Signature Ultra Strength Antacid (calcium carbonate 1000 mg)?
CONFIRMED Guardian Drug Company
Dayton, NJ · manufacturer · as of Jun 10, 2026
Sold by Costco under its Kirkland Signature label.
The label text in the record says "MANUFACTURED BY: GUARDIAN DRUG COMPANY". The record status was "Ongoing" when checked.
The record
Record Facts FDA · D-0557-2026
- Source
- FDA Enforcement Report
- Date
- Jun 10, 2026 (FDA report date)
- Filed by
- Guardian Drug Co. Inc., Dayton, NJ
- Class
- Class II
- Status
- Ongoing (when we checked)
- Reason
- Presence of foreign substance: small metallic particles in chewable tablets.
- Label text
- KIRKLAND Signature, ULTRA STRENGTH ANTACID, Calcium Carbonate, 1000 mg, 265-count bottle, MANUFACTURED BY: GUARDIAN DRUG COMPANY, INC., 2 CHARLES COURT/DAYTON, NJ 08810, FOR: Costco Wholesale Corporation, 999 Lake Drive, Issaquah, WA 98027, NDC 63981-171-80
Date checked: 2026-10-31. A record shows who made or recalled the product at that time. It does not prove who makes it today, and we never say a store-brand item is “the same” as a name brand unless a record says so.
More from Guardian Drug Company.
What the stamps mean
CONFIRMEDA government record (an FDA, NHTSA or CPSC recall, a court docket or a public company filing) names the company, linked below.
LIKELYA company statement or solid published reporting names the company, but we found no official record.
UNCONFIRMEDWe could not find proof of who makes it. We don't guess.
A record shows who made or recalled a product on that date. Suppliers change. How we check.
The daily deals + “Who Makes It” email
Each morning: the 5 hottest price cuts, checked on the store's own page, plus one store brand traced to its maker and any new recalls that name a store brand. Free; unsubscribe any time.
We only use your address to send this email. Privacy.
Who Really Makes It