Independent register of U.S. FDA drug recalls · updated Oct 10, 2026
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Wrong potency or content

Sub- or super-potent product, or a failed content-uniformity / assay test. You may receive too little or too much active ingredient - a direct dosing risk.

992 FDA drug recalls with this cause, newest first.

These recalls cover sub-potent or super-potent products, or a failed content-uniformity test - meaning some pills in the same batch held noticeably different amounts of active ingredient than others. Either way it is a direct dosing risk: too little to work, or too much and harmful. Thyroid hormones and compounded injectables are the classic examples, because their dose window is narrow.

Class III · Low risk

Fentanyl

Subpotency: Out-of-specification stability test result for low potency was obtained.

Terminated Wrong potency / content SCA Pharmaceuticals D-0147-2021
Class III · Low risk

Testosterone Gel 1%

Superpotent Drug: High out-of-specification assay results were obtained during stability testing.

Terminated Wrong potency / content Teva Pharmaceuticals USA NDC 0591-3216-17 D-0100-2021
Class I · High risk

NP Thyroid 120

Subpotent Drug: FDA analysis found these products to be less than the labeled claim for the levothyroxine (T4) portion of the product.

Terminated Wrong potency / content Acella Pharmaceuticals, LLC NDC 42192-328-01 D-0036-2021
Class I · High risk

NP Thyroid 15

Subpotent Drug: FDA analysis found these products to be less than the labeled claim for the levothyroxine (T4) portion of the product.

Terminated Wrong potency / content Acella Pharmaceuticals, LLC NDC 42192-327-01 D-0035-2021
Class I · High risk

Nature Throid

Subpotent Drug: FDA analysis found product to be subpotent

Terminated Wrong potency / content RLC Labs Inc. NDC 64727-3305-4 D-1619-2020
Class I · High risk

Nature Throid

Subpotent Drug: FDA analysis found product to be subpotent

Terminated Wrong potency / content RLC Labs Inc. NDC 64727-3308-4 D-1618-2020
Class I · High risk

Nature Throid

Subpotent Drug: FDA analysis found product to be subpotent

Terminated Wrong potency / content RLC Labs Inc. NDC 64727-3303-1 D-1617-2020
Class I · High risk

Nature Throid

Subpotent Drug: FDA analysis found product to be subpotent

Terminated Wrong potency / content RLC Labs Inc. NDC 64727-3302-1 D-1616-2020
Class I · High risk

Nature Throid

Subpotent Drug: FDA analysis found product to be subpotent

Terminated Wrong potency / content RLC Labs Inc. NDC 64727-3299-6 D-1615-2020
Class I · High risk

WP Thyroid

Subpotent Drug: FDA analysis found product to be subpotent

Terminated Wrong potency / content RLC Labs Inc. NDC 64727-5550-4 D-1614-2020
Class II · Moderate risk

WP Thyroid

CGMP Deviations: manufactured under the same conditions as those found to be subpotent.

Terminated Wrong potency / content RLC Labs Inc. NDC 64727-5950-2 D-1613-2020