Who makes Kirkland Signature Acid Controller (Famotidine 20 mg), 250 Tablets?
As of August 30, 2026, the manufacturer of Kirkland Signature Acid Controller (Famotidine 20 mg), 250 Tablets is Perrigo, per plant / registration code evidence.
The common claim
What most answers say — and what the evidence supports
Store-brand roundups and AI answer boxes that venture a name generally credit Perrigo - the largest US maker of private-label OTC drugs - while most listings (NDC databases, DailyMed) name only Costco Wholesale as the labeler and leave the maker blank. FDA drug records and Costco's own listing both line up with the Perrigo read: Kirkland Signature Acid Controller famotidine 20 mg (NDC 63981-194) is marketed under ANDA 077351, whose Drugs@FDA applicant is Perrigo, and Costco's own product listing for the two-bottle 250-tablet item independently carries "L Perrigo Company" in its manufacturer field. FDA recalls also show Perrigo handling Costco's sister acid reducer (the Kirkland "Maximum Strength Acid Reducer" ranitidine, NDC 63981-852-56) and a Kirkland ALLER-FEX lot "For Costco Wholesale Corporation." The two routes agree: Kirkland Signature Acid Controller is manufactured by Perrigo, per Costco's product-catalog manufacturer field (L. Perrigo Company) corroborated by FDA's Drugs@FDA record for ANDA 077351. The ANDA applicant is FDA's responsible party rather than a guaranteed physical packer, which is why the retailer's own field naming the same company is what closes the attribution.
Evidence & sources
Every source is graded on the six-tier rubric and archived, so the citation holds even if the original moves or paywalls. The tier badge grades the source; the status grades our confidence in the maker.
Tier 3
DailyMed's FDA-sourced label is titled "KIRKLAND SIGNATURE ACID CONTROLLER- famotidine tablet, film coated", names Costco Wholesale Company as the labeler (establishment DUNS 103391843), lists NDC 63981-194 (famotidine 20 mg film-coated tablet, marketed since 2007-05-24), and in Marketing Information gives Marketing Category "Abbreviated New Drug Application" with Application Number ANDA077351. No establishment or registrant other than Costco appears on the SPL, so the deterministic link runs through the ANDA number rather than an on-label "manufactured by" line. This is the brand-to-ANDA anchor; the sibling source (openFDA Drugs@FDA) resolves ANDA077351 to Perrigo.
Tier 3
FDA's Drugs@FDA database resolves ANDA077351 - the application under which Costco markets Kirkland Signature Acid Controller famotidine 20 mg (NDC 63981-194) - to sponsor/applicant PERRIGO R AND D (Perrigo, the largest US maker of private-label OTC drugs), OTC product FAMOTIDINE 20 MG. On its own this join would cap the grade at probable: the ANDA applicant is FDA's responsible party for the product but is not always the physical packer. Costco's own catalog manufacturer field naming L. Perrigo Company for the same item (see the Costco Business Delivery source) is the independent corroboration that carries the record to confirmed (DECISIONS 2026-08-30). Independent corroboration that Perrigo sits in Costco's acid-reducer supply chain: FDA recall D-1026-2020 (Class II, initiated 2019-10-23) lists Perrigo Company PLC as the recalling firm for the Kirkland "Maximum Strength Acid Reducer" ranitidine 150 mg (NDC 63981-852-56) - the sister H2-blocker Costco sold before the industry-wide ranitidine/NDMA withdrawal - and recall D-0355-2022 (Class II) lists a "KIRKLAND ALLER-FEX" fexofenadine lot "Packaged by Perrigo 515 Eastern Ave., Allegan, MI 49010, For Costco Wholesale Corporation" (NDC 63981-571-48). Snapshot created 2026-08-01 and content-verified (contains PERRIGO R AND D + ANDA077351). The ANDA077351 -> Perrigo resolution and both recall records were verified live against the openFDA drugsfda and enforcement APIs that day.
Tier 4
Costco's Business Delivery storefront (costcobusinessdelivery.com) serves the same US catalog data as costco.com and, unlike costco.com, can be fetched and archived. Its page for this item - 'Kirkland Signature Famotidine Acid Controller, 20 mg, 2 Bottles of 125 Tablets' (item 100283902) - embeds catalog JSON whose manufacturer field reads mfName: "L PERRIGO COMPANY", L. Perrigo Company being Perrigo's principal US operating company (Allegan, MI). Read on August 30, 2026 and verified present in the Wayback snapshot created the same day. The costco.com consumer page for the same product (item 100422594) was also read live in a browser that day and carries the identical mfName value; costco.com cannot be archived, so the Business Delivery page is the citable copy. An internal catalog field rather than an editorial statement, and such fields can name a supplier-of-record rather than the plant; here it independently corroborates the FDA route (NDC 63981-194 -> ANDA 077351 -> sponsor Perrigo R&D) - the retailer and the regulator naming the same company - which satisfies the mfName-plus-independent-naming rule for confirmed (DECISIONS 2026-08-30). The ANDA holder remains FDA's responsible party rather than a guaranteed physical packer; the retailer's own field agreeing with it is what closes the attribution.
Frequently asked
Who makes Kirkland Signature Acid Controller (famotidine) for Costco?
Is Kirkland Acid Controller the same as Pepcid AC?
Was Kirkland Acid Controller ever recalled?
As an Amazon Associate we earn from qualifying purchases. The link is affiliate-tagged and marked rel="sponsored"; this never affects an attribution or its grade.
Get notified when a Kirkland manufacturer changes
Suppliers switch quietly and most sites never notice. We track the changes and log the day a maker moves — the same tracking that powers the change log.
Change-log newsletter · no spam · unsubscribe anytime.