Medication class

Thyroid

Thyroid hormone replacements and anti-thyroid drugs for managing hypothyroidism and hyperthyroidism.

Data updated 2026-05-15

5
Medications
5
With a generic
43%
Avg generic savings
0
In active shortage

Drug class assignments follow the FDA openFDA therapeutic classification, clinical details are drawn from FDA Structured Product Labeling via DailyMed, and unit-price comparisons use CMS National Average Drug Acquisition Cost data. See the full sources below.

Inventory versus report volume

Thyroid is inventory #22 of 22 (5 drugs) ≠ FAERS-volume #19. Nationally Mental Health is inventory #1 of 22 (77 drugs) ≠ Pain Relief FAERS-volume #1 at inventory #3.

#22
inventory
5
tracked drugs
#19
FAERS volume
#1
Pain Relief FAERS nationally

According to FDA FAERS report totals and openFDA class inventory compiled on /methodology. Class size is not the same map as report volume. This page is for informational purposes only and is not medical advice.

This class - generic availability cut

Exclusive DISTINCT-drug split of 5 medicines in Thyroid. Orthogonal to inventory vs FAERS dual and to the NADAC cost ChartBar.

thyroid (desiccated) tops Thyroid NADAC at $2.00/unit

Top 5 acquisition costs in this class (CMS NADAC)

per unit

What this shows thyroid (desiccated) is the costliest in this class at $2.00/unit; generics in the same class run a fraction of that.

Source CMS National Average Drug Acquisition Cost (NADAC)

Thyroid sits at the smallest inventory band among 22 classes

0 classes have fewer tracked drugs; percentile 0 among PlainMeds categories.

Thyroid vs all classes by tracked-drug count

Where this class's inventory sits among every PlainMeds therapeutic category

5 22nd of 22 the lowest of 22 classes

Classes, banded by tracked-drug inventory

Each bar is a band; taller bars hold more classes. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source PlainMeds openFDA therapeutic-class inventory · 2026-05-15

Thyroid · top generic-availability (#1 of 22 at 100%)

100% of thyroid medications have a generic available, ranking #1 of 22 therapeutic classes (the typical class sits near 74%).

47% (lowest class) 100% (highest class)

Source: CMS NADAC generic-availability flags across all PlainMeds therapeutic classes. The dot is this class; the line is the cross-class median.

levothyroxine

Synthroid, Levoxyl, Tirosint

Levothyroxine is a medicine that replaces a hormone normally made by your thyroid gland.

View details →

liothyronine

Cytomel

Liothyronine (Cytomel) is a medicine that replaces a thyroid hormone called T3.

View details →

methimazole

Tapazole

Methimazole (Tapazole) is a medicine that lowers the amount of thyroid hormone your body makes.

View details →

propylthiouracil

PTU

Propylthiouracil (PTU) is a medicine that treats an overactive thyroid.

View details →

thyroid (desiccated)

Armour Thyroid, Nature-Throid

Armour Thyroid is a natural thyroid hormone medicine.

View details →

Compare levothyroxine vs liothyronine side-by-side →

Thyroid · top generic-availability class (#1 of 22)

Thyroid is inventory #22 of 22 (5 drugs) ≠ FAERS-volume #19. Nationally Mental Health is inventory #1 of 22 (77 drugs) ≠ Pain Relief FAERS-volume #1 at inventory #3. 5 medicines tracked; 5 carry a NADAC generic flag.

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Classes nearest Thyroid by inventory size

Osteoporosis 9 Muscle Relaxants 10 Sleep 10 Blood Thinners 16 Urinary 18 Allergies 19 Eye Care 21 Cholesterol 22

Read our methodology - how this data is sourced, computed, and verified.