The Recall Desk
Agency classClass IOur severity:CriticalFDA (Drugs)·D-1615-2020·Announced 2020-09-23

RLC Labs Recalls Subpotent Nature Throid Thyroid Medication

RLC Labs Inc. is recalling Nature Throid thyroid medication because FDA analysis found the product to be subpotent.

The agency’s classification

FDA (Drugs): Class I

Class I is a situation in which there is a reasonable probability that the use of or exposure to a violative product will cause serious adverse health consequences or death.

This is the agency’s own classification, taken from its notice. The severity score below is our assessment, not the agency’s. How recall classes work

What this means for you

Our assessment, not the agency’s: severity 5/5 (Critical).

Highest-severity recall. The hazard can cause serious injury or death. Stop using the product now and follow the agency's instructions.

Our severity reasoning: The source text explicitly identifies the agency classification as 'Class I', which mandates a severity score of 5 according to the rubric.

Plain-English summary

RLC Labs Inc. is recalling Nature Throid, 1/2 Grain (32.5 mg) Thyroid USP, a prescription-only medication containing Liothyronine (T3) and Levothyroxine (T4). The recall affects 90-count bottles (NDC 64727-3299-6) and 100-count bottles (NDC 64727-3299-1) with Lot # 099186 and an expiration date of 11/2022.

The FDA classified this as a Class I recall because analysis determined the product is subpotent, meaning it does not contain the full amount of the active ingredient required by the label. Subpotent medications may fail to provide the intended therapeutic effect for patients relying on the drug for thyroid hormone replacement.

The product was distributed nationwide in the United States. Consumers and healthcare providers should stop using the affected product and contact their healthcare provider or pharmacist for guidance on alternative treatment options.

The recalled product

Product
Nature Throid, 1/2 Grain (32.5 mg) Thyroid USP [Liothyronine (T3) 4.5 mcg, Levothyroxine (T4) 19 mcg], packaged in a) 90-count bottles (NDC 64727-3299-6), b) 100-count bottles (NDC 64727-3299-1), Rx only, Manufactured by: RLC Labs Phoenix, AZ 85034
Manufacturer
RLC Labs Inc.

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Lot numbers (2)

  • Lot #: 099186
  • Exp. Date 11/2022

Distribution

Distributed nationwide across the United States.

Part of a larger recall action

This product is one of 24 recalled by RLC Labs Inc. under a single FDA (Drugs) recall action. The agency files each product separately, so the size of the action is not visible from this page alone.

See all 24 products in this recall →

Same manufacturer · RLC Labs Inc.

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