SKELAXIN

Product NDC
55289-736
Requested package NDC
55289-736-20
11-digit product format
552890736
Labeler code
55289
Product ID
55289-736_debe0f76-305b-d83f-e053-2995a90ad3c8
Type
HUMAN PRESCRIPTION DRUG
Nonproprietary name
metaxalone
Dosage form
TABLET
Route
ORAL
Labeler
PD-Rx Pharmaceuticals, Inc.
Application
NDA013217
Marketing category
NDA
Marketing start
2002-08-30
Marketing end
2022-11-30
Substance
METAXALONE
Active strength
800 mg/1
Pharmacologic classes
Centrally-mediated Muscle Relaxation [PE]
NDC exclude flag
No
Listing certified through
0000-00-00
Current FDA listing
Historical FDA.report record

NDC auxiliary status#

These records are reproduced from FDA’s unfinished, excluded, and compounder listings. They describe what appeared in the source files; a missing record does not establish a regulatory status. View all current auxiliary records, including entries without an NDC. · View the auxiliary file history.

Current NDC status page 1 of 1 · 1 matching rows.

Dataset, Scope, Product NDC table
DatasetScopeProduct NDCPackage NDCCodeStatusReporting periodSource date
excluded packagepackage55289-73655289-736-20DDiscontinued by firm2026-08-11

Observed NDC auxiliary status history#

This history shows the information present in each captured FDA auxiliary file. It is not a continuous regulatory timeline, and a missing record does not establish a status.

Historic NDC status page 1 of 1 · 12 matching rows.

View current auxiliary records. · View the auxiliary file history.

Captured / source date, Snapshot, Source SHA-256 table
Captured / source dateSnapshotSource SHA-256
2025-12-14 17:58 UTC · source 2025-12-05d630ba8d3edf…732f749b63fb…
2025-08-27 00:01 UTC · source 2025-08-26f5e01cc5f278…a2eaf40c39c3…
2025-04-01 02:39 UTC · source 2025-03-312ef7874e63bc…57b86245f4fa…
2025-03-28 20:22 UTC · source 2025-03-28a1b67e2a42f9…c4cf2c586c0d…
2025-03-22 03:12 UTC · source 2025-03-21cfe11265f3b6…090c488252e2…
2025-03-10 12:48 UTC · source 2025-03-10cdf11ea48f46…ba0047e9e063…
2025-02-02 03:52 UTC · source 2025-01-31302b2466d912…e7b80fea0513…
2025-01-20 13:05 UTC · source 2025-01-20ed331223b511…672a5bd82f5f…
2025-01-11 03:41 UTC · source 2025-01-100efc9e666f02…f202fb6c5f17…
2024-11-09 02:27 UTC · source 2024-11-08ad56d346431e…cc804d4bbf1e…
2024-10-04 04:10 UTC · source 2024-10-03367a005e9d99…383a685ebd0f…
2024-07-10 04:00 UTC · source 2024-07-09557ba5c1ecfa…9c80585c8c6e…

Source provenance: Browse the complete Orange Book source catalog · source snapshot 1.

Orange Book products#

Current product rows page 1 of 1 · 2 matching rows.

Application-product, Trade name, Ingredient table
Application-productTrade nameIngredientStrengthDosage form / routeTE codesRLD / RSApproval date
N013217-001SKELAXINMETAXALONE400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 1982
N013217-003SKELAXINMETAXALONE800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-30

Orange Book patents#

Current patent rows page 1 of 1 · 1 matching rows.

Application-product, Patent, Expiration table
Application-productPatentExpirationUse codeCoverage / statusSubmission date
N013217-00371225662026-02-06U-915

Observed Orange Book product history#

Observed FDA ZIP history: Each table is queried independently by exact application/product key from successfully parsed Orange Book snapshots. Capture times identify archived source observations; absence or a change between snapshots is not inferred. FDA publication files that were not recoverable as structured ZIP data are not represented as states.

Product history page 1 of 3 · 82 observed states.

Captured, Edition, Application-product table
CapturedEditionApplication-productTrade nameStrengthDosage form / routeProduct TE source textRLD / RSApproval dateSource SHA-256
2026-02-19 14:30 UTC2026-02N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 1982011fe1cb6892…
2026-02-19 14:30 UTC2026-02N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-30011fe1cb6892…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 198231067a03dcf5…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-3031067a03dcf5…
2025-08-23 18:47 UTC2025-08N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 19826a471c1ec25d…
2025-08-23 18:47 UTC2025-08N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-306a471c1ec25d…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 1982fd3edfee7708…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-30fd3edfee7708…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 1982b8a1b40f171c…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-30b8a1b40f171c…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 198203ed91905a0d…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-3003ed91905a0d…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 19822680178bc6a6…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-302680178bc6a6…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 19825bbf6a4d5a75…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-305bbf6a4d5a75…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 1982d8e5a09893c0…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-30d8e5a09893c0…
2024-10-29 15:01 UTC2024-10N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 1982d06236e962d9…
2024-10-29 15:01 UTC2024-10N013217-003SKELAXIN800MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD2002-08-30d06236e962d9…
2024-08-13 05:28 UTC · 3 captures of this ZIP2024-08N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 198279d66fd596c7…
2024-08-13 05:28 UTC · 3 captures of this ZIP2024-08N013217-003SKELAXIN800MGTABLET / ORALRLD2002-08-3079d66fd596c7…
2024-07-13 05:37 UTC · 2 captures of this ZIP2024-07N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 1982301d65b070ca…
2024-07-13 05:37 UTC · 2 captures of this ZIP2024-07N013217-003SKELAXIN800MGTABLET / ORALRLD2002-08-30301d65b070ca…
2024-06-18 03:08 UTC · 5 captures of this ZIP2024-06N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 19821e350fbaab3a…
2024-06-18 03:08 UTC · 5 captures of this ZIP2024-06N013217-003SKELAXIN800MGTABLET / ORALRLD2002-08-301e350fbaab3a…
2024-05-31 18:47 UTC2024-05N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 19828072bd15b7f6…
2024-05-31 18:47 UTC2024-05N013217-003SKELAXIN800MGTABLET / ORALRLD2002-08-308072bd15b7f6…
2022-06-29 02:47 UTC · 2 captures of this ZIP2022-06N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 19825c6f7cd8ea54…
2022-06-29 02:47 UTC · 2 captures of this ZIP2022-06N013217-003SKELAXIN800MGTABLET / ORALABRLD, RS2002-08-305c6f7cd8ea54…
2022-04-08 23:34 UTC2022-04N013217-001SKELAXIN400MGTABLET / ORALRLD, Approved before 19825d02ea3f76ae…
2022-04-08 23:34 UTC2022-04N013217-003SKELAXIN800MGTABLET / ORALABRLD, RS2002-08-305d02ea3f76ae…
2022-04-04 05:41 UTC2022-04N013217-001SKELAXIN400MGTABLET / ORALRLD, Approved before 19824b0b4de00fa7…
2022-04-04 05:41 UTC2022-04N013217-003SKELAXIN800MGTABLET / ORALABRLD, RS2002-08-304b0b4de00fa7…
2019-12-13 00:20 UTC2019-12N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or efficacy reasons**TABLET / ORALRLD, Approved before 198274a2ff9319b5…
2019-12-13 00:20 UTC2019-12N013217-003SKELAXIN800MGTABLET / ORALABRLD, RS2002-08-3074a2ff9319b5…
2022-03-09 01:35 UTC2022-03N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or effectiveness reasons**TABLET / ORALRLD, Approved before 1982bb7c543d1eb4…
2022-03-09 01:35 UTC2022-03N013217-003SKELAXIN800MGTABLET / ORALABRLD, RS2002-08-30bb7c543d1eb4…
2021-12-28 21:50 UTC2021-12N013217-001SKELAXIN400MG **Federal Register determination that product was not discontinued or withdrawn for safety or efficacy reasons**TABLET / ORALRLD, Approved before 1982782e0a99824c…
2021-12-28 21:50 UTC2021-12N013217-003SKELAXIN800MGTABLET / ORALABRLD, RS2002-08-30782e0a99824c…

Observed Orange Book normalized TE history#

Captured, Edition, Application-product table
CapturedEditionApplication-productTE codeOrderSource SHA-256
2022-06-29 02:47 UTC · 2 captures of this ZIP2022-06N013217-003AB15c6f7cd8ea54…
2022-04-08 23:34 UTC2022-04N013217-003AB15d02ea3f76ae…
2022-04-04 05:41 UTC2022-04N013217-003AB14b0b4de00fa7…
2019-12-13 00:20 UTC2019-12N013217-003AB174a2ff9319b5…
2022-03-09 01:35 UTC2022-03N013217-003AB1bb7c543d1eb4…
2021-12-28 21:50 UTC2021-12N013217-003AB1782e0a99824c…
2021-05-05 16:15 UTC · 3 captures of this ZIP2021-05N013217-003AB187673890dc5c…
2021-03-12 10:30 UTC2021-03N013217-003AB15aa47cf7b7d7…
2020-12-22 03:56 UTC2020-12N013217-003AB18869cabd3fbd…
2020-11-12 02:37 UTC2020-11N013217-003AB1c0c555d07b60…
2019-12-14 00:12 UTC2019-12N013217-003AB13f01610625f2…
2019-09-15 20:21 UTC2019-09N013217-003AB1b00525d2431f…
2019-07-19 19:46 UTC2019-07N013217-003AB1ea99ee380514…
2023-07-15 15:27 UTC · 2 captures of this ZIP2023-07N013217-003AB1a67488948f0b…
2023-06-13 01:57 UTC · 3 captures of this ZIP2023-06N013217-003AB13f0d92c62455…
2023-05-13 08:27 UTC2023-05N013217-003AB1053a50430f4f…
2023-01-26 05:58 UTC2023-01N013217-003AB13bdfa0b2c4d7…
2022-11-12 20:34 UTC · 5 captures of this ZIP2022-11N013217-003AB13a93d1ddd44b…
2022-10-28 04:53 UTC2022-10N013217-003AB1f41ea6bd6efb…
2022-09-29 23:25 UTC2022-09N013217-003AB1e64feba35796…
2022-07-09 03:26 UTC · 3 captures of this ZIP2022-07N013217-003AB1cb3db0bc1861…

Observed Orange Book patent history#

Patent history page 1 of 2 · 50 observed states.

Captured, Edition, Application-product table
CapturedEditionApplication-productPatentExpirationUse codeCoverage / statusSubmission dateSource SHA-256
2026-02-19 14:30 UTC2026-02N013217-00371225662026-02-06U-915011fe1cb6892…
2025-12-14 10:44 UTC · 2 captures of this ZIP2025-12N013217-00371225662026-02-06U-91531067a03dcf5…
2025-08-23 18:47 UTC2025-08N013217-00371225662026-02-06U-9156a471c1ec25d…
2025-03-22 03:13 UTC · 3 captures of this ZIP2025-03N013217-00371225662026-02-06U-915fd3edfee7708…
2025-02-26 10:13 UTC · 3 captures of this ZIP2025-02N013217-00371225662026-02-06U-915b8a1b40f171c…
2025-01-19 17:59 UTC · 7 captures of this ZIP2025-01N013217-00371225662026-02-06U-91503ed91905a0d…
2024-12-13 21:23 UTC · 2 captures of this ZIP2024-12N013217-00371225662026-02-06U-9152680178bc6a6…
2024-09-14 05:58 UTC · 2 captures of this ZIP2024-09N013217-00371225662026-02-06U-9155bbf6a4d5a75…
2024-11-08 22:44 UTC · 3 captures of this ZIP2024-11N013217-00371225662026-02-06U-915d8e5a09893c0…
2024-10-29 15:01 UTC2024-10N013217-00371225662026-02-06U-915d06236e962d9…
2024-08-13 05:28 UTC · 3 captures of this ZIP2024-08N013217-00371225662026-02-06U-91579d66fd596c7…
2024-07-13 05:37 UTC · 2 captures of this ZIP2024-07N013217-00371225662026-02-06U-915301d65b070ca…
2024-06-18 03:08 UTC · 5 captures of this ZIP2024-06N013217-00371225662026-02-06U-9151e350fbaab3a…
2024-05-31 18:47 UTC2024-05N013217-00371225662026-02-06U-9158072bd15b7f6…
2022-06-29 02:47 UTC · 2 captures of this ZIP2022-06N013217-00371225662026-02-06U-9155c6f7cd8ea54…
2022-04-08 23:34 UTC2022-04N013217-00371225662026-02-06U-9155d02ea3f76ae…
2022-04-04 05:41 UTC2022-04N013217-00371225662026-02-06U-9154b0b4de00fa7…
2019-12-13 00:20 UTC2019-12N013217-00377140062021-12-03U-105074a2ff9319b5…
2019-12-13 00:20 UTC2019-12N013217-00371225662026-02-06U-91574a2ff9319b5…
2022-03-09 01:35 UTC2022-03N013217-00371225662026-02-06U-915bb7c543d1eb4…
2021-12-28 21:50 UTC2021-12N013217-00377140062021-12-03U-1050782e0a99824c…
2021-12-28 21:50 UTC2021-12N013217-00371225662026-02-06U-915782e0a99824c…
2021-05-05 16:15 UTC · 3 captures of this ZIP2021-05N013217-00377140062021-12-03U-105087673890dc5c…
2021-05-05 16:15 UTC · 3 captures of this ZIP2021-05N013217-00371225662026-02-06U-91587673890dc5c…
2021-03-12 10:30 UTC2021-03N013217-00377140062021-12-03U-10505aa47cf7b7d7…
2021-03-12 10:30 UTC2021-03N013217-00371225662026-02-06U-9155aa47cf7b7d7…
2020-12-22 03:56 UTC2020-12N013217-00377140062021-12-03U-10508869cabd3fbd…
2020-12-22 03:56 UTC2020-12N013217-00371225662026-02-06U-9158869cabd3fbd…
2020-11-12 02:37 UTC2020-11N013217-00377140062021-12-03U-1050c0c555d07b60…
2020-11-12 02:37 UTC2020-11N013217-00371225662026-02-06U-915c0c555d07b60…
2019-12-14 00:12 UTC2019-12N013217-00377140062021-12-03U-10503f01610625f2…
2019-12-14 00:12 UTC2019-12N013217-00371225662026-02-06U-9153f01610625f2…
2019-09-15 20:21 UTC2019-09N013217-00377140062021-12-03U-1050b00525d2431f…
2019-09-15 20:21 UTC2019-09N013217-00371225662026-02-06U-915b00525d2431f…
2019-07-19 19:46 UTC2019-07N013217-00377140062021-12-03U-1050ea99ee380514…
2019-07-19 19:46 UTC2019-07N013217-00371225662026-02-06U-915ea99ee380514…
2024-03-16 18:09 UTC · 4 captures of this ZIP2024-03N013217-00371225662026-02-06U-9156a51e52b5d6a…
2024-02-18 07:12 UTC2024-02N013217-00371225662026-02-06U-9151c564ffb4f44…
2023-12-20 04:57 UTC2023-12N013217-00371225662026-02-06U-915ea1830bbd6c7…
2023-11-28 05:40 UTC · 2 captures of this ZIP2023-11N013217-00371225662026-02-06U-915a72a2bbeb626…

DailyMed Billing Units#

Package NDC, Billing unit, Product NDC table
Package NDCBilling unitProduct NDCDailyMed indexing SPLSPL versionEffective
55289-736-10EA - Each55289-736743913e9-15eb-4911-b515-cc6166f7b8f312013-02-13
55289-736-15EA - Each55289-73664c1cde6-a385-4a0f-b31d-30ff077854bd12013-02-13
55289-736-20EA - Each55289-7362fd96553-2c44-4360-a497-aad934db63a912013-02-13
55289-736-21EA - Each55289-73678b86e17-6594-43c8-8fff-e22f986a14a612013-02-13
55289-736-30EA - Each55289-736cb700729-2c9c-4aa9-99e6-da9afec9375e12013-02-13
55289-736-40EA - Each55289-736ef00f0a0-9381-43da-8c86-02cf171bac2c12013-03-03

DailyMed Socrata Ingredients#

Packages#

Package NDC, 11-digit format, Description table
Package NDC11-digit formatDescriptionUnitsMarketing startMarketing endSampleExclude flagStatus
55289-736-205528907362020 TABLET in 1 BOTTLE, PLASTIC (55289-736-20) 20 tablet2011-09-062022-11-30NoNoCurrent