DEA schedule
Is Synthroid a controlled substance?
Synthroid contains levothyroxine. Federal schedule from the FDA NDC directory, checked against the DEA controlled substances list.
Source: FDA NDC Directory file dated 2026-10-22. Publisher page
No. Synthroid (levothyroxine) is not a federally controlled substance. None of its FDA NDC listings carries a DEA schedule, and levothyroxine is not on the DEA controlled substances list.
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Schedule check
| Source | What it lists |
|---|---|
| FDA NDC directory | 12 prescription listings from 1 labelers, none with a DEA schedule |
| DEA controlled substances list | levothyroxine is not on the list |
Synthroid NDC listings
| NDC | Product | Form | Strength | Labeler | DEA schedule |
|---|---|---|---|---|---|
| 0074-6624 | Synthroid | tablet | 100 ug/1 | AbbVie Inc. | None |
| 0074-9296 | Synthroid | tablet | 112 ug/1 | AbbVie Inc. | None |
| 0074-7068 | Synthroid | tablet | 125 ug/1 | AbbVie Inc. | None |
| 0074-3727 | Synthroid | tablet | 137 ug/1 | AbbVie Inc. | None |
| 0074-7069 | Synthroid | tablet | 150 ug/1 | AbbVie Inc. | None |
| 0074-7070 | Synthroid | tablet | 175 ug/1 | AbbVie Inc. | None |
| 0074-7148 | Synthroid | tablet | 200 ug/1 | AbbVie Inc. | None |
| 0074-4341 | Synthroid | tablet | 25 ug/1 | AbbVie Inc. | None |
| 0074-7149 | Synthroid | tablet | 300 ug/1 | AbbVie Inc. | None |
| 0074-4552 | Synthroid | tablet | 50 ug/1 | AbbVie Inc. | None |
| 0074-5182 | Synthroid | tablet | 75 ug/1 | AbbVie Inc. | None |
| 0074-6594 | Synthroid | tablet | 88 ug/1 | AbbVie Inc. | None |
Questions
Is Synthroid a controlled substance?
No. Synthroid (levothyroxine) is not a federally controlled substance. None of its FDA NDC listings carries a DEA schedule, and levothyroxine is not on the DEA controlled substances list.
Is Synthroid a narcotic?
No. Synthroid (levothyroxine) is not on the DEA controlled substances list, so the DEA does not classify it as a narcotic. Its FDA established pharmacologic class is l-Thyroxine.
Does this page cover state schedules?
No. This page reports the federal schedule only. Some states schedule drugs on their own; check your state board of pharmacy.
More on Synthroid
- What is Synthroid used for?FDA label uses
- Generic for SynthroidFDA Orange Book
- What is Levothyroxine used for?FDA label uses
- Is Levothyroxine a controlled substance?Federal schedule
- Generic for TirosintFDA Orange Book
- Generic for ThyquidityFDA Orange Book
- Generic for Tirosint-solFDA Orange Book
- Generic for Levo-tFDA Orange Book
- Generic for LevoletFDA Orange Book
- Generic for LevoxylFDA Orange Book
- Generic for Thyro-tabsFDA Orange Book
- Generic for UnithroidFDA Orange Book
- L-Thyroxines listFDA drug class
- Synthroid Medicare Part D coverageBy plan and state
- NDC 0074-3727Synthroid NDC record
- NDC 0074-4341Synthroid NDC record