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thyroid (usp)

Sold as Adthyza, Amerithroid, Armour Thyroid, Evexithroid, Nature-Throid and 5 more.

This grade answers one narrow question: how strong is the public evidence and safety record behind this drug, and how clean is its money trail and court record? It is not a verdict on whether the drug is right for you.

C

Score breakdown (68/100)

Safety ×35%
A
Evidence ×25%
F
Regulatory ×15%
B
Money & lawsuits ×15%
A
Options ×10%
F

Safety: 90

Evidence: 17

Regulatory history: 85

Money & lawsuits: 100

Options: 40

What the FDA label says

Approved uses

INDICATIONS AND USAGE Amerithroid® (Thyroid Tablets, USP) are indicated: 1. As replacement or supplemental therapy in patients with hypothyroidism of any etiology, except transient hypothyroidism during the recovery phase of subacute thyroiditis. This category includes cretinism, myxedema, and ordinary hypothyroidism in patients of any age (children, adults, the elderly), or state (including pregnancy); primary hypothyroidism resulting from functional deficiency, primary atrophy, partial or total absence of thyroid gland, or the effects of surgery, radiation, or drugs, with or without the presence of goiter; and secondary (pituitary), or tertiary (hypothalamic) hypothyroidism (See WARNINGS ). 2. As pituitary TSH suppressants, in the treatment or prevention of various types of euthyroid goiters, including thyroid nodules, subacute or chronic lymphocytic thyroiditis (Hashimoto’s), multinodular goiter, and in the management of thyroid cancer.

Contraindications

CONTRAINDICATIONS Thyroid hormone preparations are generally contraindicated in patients with diagnosed but as yet uncorrected adrenal cortical insufficiency, untreated thyrotoxicosis, and apparent hypersensitivity to any of their active or extraneous constituents. There is no well-documented evidence from the literature, however, of true allergic or idiosyncratic reactions to thyroid hormone.

Warnings and precautions

WARNINGS Drugs with thyroid hormone activity, alone or together with other therapeutic agents, have been used for the treatment of obesity. In euthyroid patients, doses within the range of daily hormonal requirements are ineffective for weight reduction. Larger doses may produce serious or even life-threatening manifestations of toxicity, particularly when given in association with sympathomimetic amines such as those used for their anorectic effects. The use of thyroid hormones in the therapy of obesity, alone or combined with other drugs, is unjustified and has been shown to be ineffective. Neither is their use justified for the treatment of male or female infertility unless this condition is accompanied by hypothyroidism.

Adverse reactions (label)

ADVERSE REACTIONS Adverse reactions other than those indicative of hyperthyroidism because of therapeutic overdosage, either initially or during the maintenance period, are rare (See OVERDOSAGE ).

Source: FDA SPL label for Amerithroid (Oliva Therapeutics, LLC), effective 20260513. Full label on DailyMed.

Side-effect reports sent to the FDA

These are counts of reports people filed, not rates of harm. Anyone can file one, and nobody checks whether the drug was the cause. Millions of doses are taken for every report sent, so the useful part is how this drug compares with the average across all drugs.

0reports that mention this drug
0of those blame this drug, not another one the person was taking
0%of reports describe a serious outcome, such as a hospital stay (average for all drugs: 57%)
0.0%of reports include a death, from any cause (average for all drugs: 9.1%)

Problems reported most often

Source: the FDA's Adverse Event Reporting System (FAERS). Reports are voluntary and unverified. Drugs that are prescribed a lot, in the news, or in lawsuits attract more reports, so the percentages are compared with the whole database to correct for that partly, not fully.

Recalls and regulatory record

1recall actions on file
0 / 0brand / generic applications
0label changes since 2021
NoREMS program
DateClassFirmReason
08/2026Class IVITRUVIAS THERAPEUTICS INCSuperpotent Drug

Class I = reasonable probability of serious harm. Class II = temporary or reversible harm. Class III = unlikely to harm. Most generic recalls are manufacturing or labeling defects for one lot, not a verdict on the molecule.

Evidence base

0randomized trials (PubMed)
6systematic reviews
13registered trials
40%of completed trials posted results
8%terminated or withdrawn
31%industry-funded

Counts measure how much evidence exists and how transparent it is, not how big the benefit is. For that, ask your prescriber: if 100 people like me took this, how many would get better because of it, and how many would be harmed? (Doctors call these the "number needed to treat" and "number needed to harm.") It differs by condition and is the number drug ads leave out. Sources: PubMed, ClinicalTrials.gov.

Money and lawsuits

In 2024, drug companies reported $111 in payments to US physicians and hospitals tied to this drug across 5 transactions (Adthyza $80, Armour Thyroid $32).

No pending federal MDL names this drug or its brands.

Not named in any federal pharmaceutical settlement of $100M or more on record.

Sources: CMS Open Payments (Sunshine Act); Judicial Panel on Multidistrict Litigation pending docket list; DOJ settlements as tabulated on Wikipedia with links to the primary record. State-court and individual suits are not included.

Who takes it and what it costs

Not in the Medicare Part D spending file (typically hospital-administered or very new drugs).

Same-class alternatives

No same-class alternatives found in RxClass.

Questions to ask your prescriber

  1. There is no generic. Is there an older generic in the same class that works as well for my situation?
  2. What result are we expecting, by when, and what is the plan if it does not happen?
  3. If 100 people like me took this drug, how many would actually get better because of it, and how many would be harmed by it? (Doctors call these the number needed to treat and the number needed to harm.)