FDA Class II Recall: ST AIA-Pack Testosterone, IN VITRO DIAGNOSTIC USE ONLY… by Tosoh Bioscience Inc

Key facts

What this classification means

A Class II recall is FDA’s middle classification. FDA assigns Class II when use of, or exposure to, the recalled product may cause temporary or medically reversible adverse health consequences, or where the probability of serious adverse health consequences is remote. FDA still requires the recalling firm to notify affected accounts and submit status reports on the correction, though the monitoring intensity is lower than for a Class I recall. FDA's Center for Devices and Radiological Health (for devices) or Center for Drug Evaluation and Research (for drugs) reviews the classification and can require additional corrective action if the initial response is judged insufficient. Because this record is filed as Class II, professionals and consumers handling an affected lot should treat FDA's own classification -- not this page's summary of it -- as the authoritative risk signal. A Class I recall is FDA’s most serious classification. FDA assigns Class I when there is a reasonable probability that use of, or exposure to, the recalled product will cause serious adverse health consequences or death. This classification does not mean harm has already occurred in every case -- it reflects FDA’s assessment of the realistic worst-case risk profile of the defect described in the recall, based on the reason for recall reported by the firm. Class I recalls receive the closest FDA monitoring of the three classes: the recalling firm typically must submit a recall strategy, periodic status reports, and effectiveness checks confirming that the affected lots have actually been removed from distribution or corrected in the field.

What consumers should do

Facilities, clinicians, and consumers holding an affected unit or lot of ST AIA-Pack Testosterone, IN VITRO DIAGNOSTIC USE ONLY for the quantitative measurement of testosterone in human serum on specific Tosoh AIA System analyzers, Model Number 0025204 should stop using it for the purpose described in the recall notice and hold remaining stock pending instructions from Tosoh Bioscience Inc. FDA recall records typically direct the recalling firm to notify known accounts directly with a recall letter describing the specific corrective action -- replacement, field correction, refund, or return. Anyone who received the product through a distributor rather than directly from Tosoh Bioscience Inc should confirm with their supplier whether their specific lot or unit is on the affected list, since recall notices are lot- or unit-specific and not every unit of a product line is necessarily included. Questions about a specific unit's status should go to Tosoh Bioscience Inc directly or to the distributor that supplied it; Argus HQ is a public-record aggregator, not the recalling firm, and cannot confirm individual unit status.

Tosoh Bioscience Inc’s FDA history

Argus HQ has recorded 1 total FDA action tied to Tosoh Bioscience Inc: 0 warning letters, 1 recall, 0 approval records, and 0 Form 483 inspection citations.

Frequently asked questions

What is the FDA recall number for this event?

FDA recall number Z-2746-2026.

What is the current status of this recall?

Status as recorded by FDA: Ongoing.

Where can I verify this recall directly with FDA?

The verbatim FDA record is the source of truth for every recall Argus HQ tracks — always confirm against fda.gov before acting.

Is ST AIA-Pack Testosterone, IN VITRO DIAGNOSTIC USE ONLY for t recalled?

Yes. FDA lists a Class II recall by Tosoh Bioscience Inc for ST AIA-Pack Testosterone, IN VITRO DIAGNOSTIC USE ONLY for the quantitative measurement of testosterone in human serum on specific Tosoh AIA System analyzers, Model Number 0025204, reported 20260722, with status "Ongoing." FDA recall number: Z-2746-2026.

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