FDA Orange Book
Generic for Rayos
Rayos contains prednisone. Orange Book status for every listed strength, the approved generic makers, and the listed patents and exclusivities.
Source: FDA Orange Book data file dated 2026-10-09. Publisher page
Yes. The generic name for Rayos is prednisone. 1 company holds an active FDA approval (ANDA) for a generic version in the Orange Book.
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Rayos products in the Orange Book
| Form and route | Strength | Brand status | Brand TE | Active generics | Generic TE codes |
|---|---|---|---|---|---|
| tablet, delayed release, oral | 1MG | Discontinued | None | 1 | None |
| tablet, delayed release, oral | 2MG | Discontinued | None | 1 | None |
| tablet, delayed release, oral | 5MG | Discontinued | None | 1 | None |
NDA 202020, held by HORIZON THERAPEUTICS USA INC. Active generics are ANDA products in the Orange Book prescription list with the same ingredient, dosage form, route and strength.
Approved generic prednisone
| Company | ANDA | TE code | Approved | Strengths |
|---|---|---|---|---|
| DR REDDYS LABORATORIES LTD | 219477 | None (No TE code listed) | October 1, 2025 | 1MG, 2MG |
| DR REDDYS LABORATORIES LTD | 218035 | None (No TE code listed) | June 26, 2026 | 5MG |
Rayos patents
| Patent | Expires | Covers | Use code | NDA |
|---|---|---|---|---|
| 9504699 | August 3, 2027 | Method of use | U-1362 | 202020 |
| 8168218 | January 7, 2028 | Drug product | U-1269 | 202020 |
Questions
Is there a generic for Rayos?
Yes. The generic name for Rayos is prednisone. 1 company holds an active FDA approval (ANDA) for a generic version in the Orange Book.
What is the generic name for Rayos?
The active ingredient in Rayos is prednisone, per the FDA Orange Book.
When does the Rayos patent expire?
The last patent listed for Rayos in the Orange Book expires January 7, 2028. A listed patent expiry date is not a generic launch date.
What does a therapeutic equivalence code mean?
In the Orange Book, codes that start with A (such as AB) mean FDA considers the product therapeutically equivalent to the reference drug. Codes that start with B mean FDA does not, at this time, consider the product therapeutically equivalent.