Primidone

Product NDC: 72789-177
11-digit product format: 727890177
Labeler code: 72789
Product ID: 72789-177_373a4c73-f3c2-2c93-e063-6294a90ad5eb
Type: HUMAN PRESCRIPTION DRUG
Nonproprietary name: Primidone
Dosage form: TABLET
Route: ORAL
Labeler: PD-Rx Pharmaceuticals, Inc.
Application: ANDA040586
Marketing category: ANDA
Marketing start: 2021-02-22
Substance: PRIMIDONE
Active strength: 250 mg/1
Pharmacologic classes: Anti-epileptic Agent [EPC], Decreased Central Nervous System Disorganized Electrical Activity [PE]
NDC exclude flag: No
Listing certified through: 2026-12-31
Current FDA listing: Yes

Source provenance: Browse the complete Orange Book source catalog · source snapshot 42.

Orange Book products#

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

Application-product, Trade name, Ingredient table
Application-product	Trade name	Ingredient	Strength	Dosage form / route	TE codes	RLD / RS	Approval date
A040586-001	PRIMIDONE	PRIMIDONE	50MG	TABLET / ORAL	AB		2005-02-24
A040586-002	PRIMIDONE	PRIMIDONE	250MG	TABLET / ORAL	AB		2005-02-24

Therapeutic equivalence codes#

Current TE-code rows page 1 of 1 · 2 matching rows.

Application-product, TE code table
Application-product	TE code
A040586-001	AB
A040586-002	AB

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 · 84 observed states.

Captured, Edition, Application-product table
Captured	Edition	Application-product	Trade name	Strength	Dosage form / route	Product TE source text	Approval date	Source SHA-256
2026-08-18 06:07:40	2026-07	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`caaa826d4ba7…`
2026-08-18 06:07:40	2026-07	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`caaa826d4ba7…`
2026-02-19 14:30 UTC	2026-02	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`011fe1cb6892…`
2026-02-19 14:30 UTC	2026-02	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`011fe1cb6892…`
2025-12-14 10:44 UTC · 2 captures of this ZIP	2025-12	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`31067a03dcf5…`
2025-12-14 10:44 UTC · 2 captures of this ZIP	2025-12	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`31067a03dcf5…`
2025-08-23 18:47 UTC	2025-08	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`6a471c1ec25d…`
2025-08-23 18:47 UTC	2025-08	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`6a471c1ec25d…`
2025-03-22 03:13 UTC · 3 captures of this ZIP	2025-03	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`fd3edfee7708…`
2025-03-22 03:13 UTC · 3 captures of this ZIP	2025-03	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`fd3edfee7708…`
2025-02-26 10:13 UTC · 3 captures of this ZIP	2025-02	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`b8a1b40f171c…`
2025-02-26 10:13 UTC · 3 captures of this ZIP	2025-02	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`b8a1b40f171c…`
2025-01-19 17:59 UTC · 7 captures of this ZIP	2025-01	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`03ed91905a0d…`
2025-01-19 17:59 UTC · 7 captures of this ZIP	2025-01	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`03ed91905a0d…`
2024-12-13 21:23 UTC · 2 captures of this ZIP	2024-12	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`2680178bc6a6…`
2024-12-13 21:23 UTC · 2 captures of this ZIP	2024-12	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`2680178bc6a6…`
2024-09-14 05:58 UTC · 2 captures of this ZIP	2024-09	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`5bbf6a4d5a75…`
2024-09-14 05:58 UTC · 2 captures of this ZIP	2024-09	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`5bbf6a4d5a75…`
2024-11-08 22:44 UTC · 3 captures of this ZIP	2024-11	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`d8e5a09893c0…`
2024-11-08 22:44 UTC · 3 captures of this ZIP	2024-11	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`d8e5a09893c0…`
2024-10-29 15:01 UTC	2024-10	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`d06236e962d9…`
2024-10-29 15:01 UTC	2024-10	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`d06236e962d9…`
2024-08-13 05:28 UTC · 3 captures of this ZIP	2024-08	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`79d66fd596c7…`
2024-08-13 05:28 UTC · 3 captures of this ZIP	2024-08	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`79d66fd596c7…`
2024-07-13 05:37 UTC · 2 captures of this ZIP	2024-07	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`301d65b070ca…`
2024-07-13 05:37 UTC · 2 captures of this ZIP	2024-07	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`301d65b070ca…`
2024-06-18 03:08 UTC · 5 captures of this ZIP	2024-06	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`1e350fbaab3a…`
2024-06-18 03:08 UTC · 5 captures of this ZIP	2024-06	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`1e350fbaab3a…`
2024-05-31 18:47 UTC	2024-05	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`8072bd15b7f6…`
2024-05-31 18:47 UTC	2024-05	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`8072bd15b7f6…`
2022-06-29 02:47 UTC · 2 captures of this ZIP	2022-06	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`5c6f7cd8ea54…`
2022-06-29 02:47 UTC · 2 captures of this ZIP	2022-06	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`5c6f7cd8ea54…`
2022-04-08 23:34 UTC	2022-04	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`5d02ea3f76ae…`
2022-04-08 23:34 UTC	2022-04	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`5d02ea3f76ae…`
2022-04-04 05:41 UTC	2022-04	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`4b0b4de00fa7…`
2022-04-04 05:41 UTC	2022-04	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`4b0b4de00fa7…`
2019-12-13 00:20 UTC	2019-12	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`74a2ff9319b5…`
2019-12-13 00:20 UTC	2019-12	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`74a2ff9319b5…`
2022-03-09 01:35 UTC	2022-03	A040586-001	PRIMIDONE	50MG	TABLET / ORAL	AB	2005-02-24	`bb7c543d1eb4…`
2022-03-09 01:35 UTC	2022-03	A040586-002	PRIMIDONE	250MG	TABLET / ORAL	AB	2005-02-24	`bb7c543d1eb4…`

Observed Orange Book normalized TE history#

Normalized TE history page 1 of 3 · 84 observed states.

Captured, Edition, Application-product table
Captured	Edition	Application-product	TE code	Order	Source SHA-256
2026-08-18 06:07:40	2026-07	A040586-001	AB	1	`caaa826d4ba7…`
2026-08-18 06:07:40	2026-07	A040586-002	AB	1	`caaa826d4ba7…`
2026-02-19 14:30 UTC	2026-02	A040586-001	AB	1	`011fe1cb6892…`
2026-02-19 14:30 UTC	2026-02	A040586-002	AB	1	`011fe1cb6892…`
2025-12-14 10:44 UTC · 2 captures of this ZIP	2025-12	A040586-001	AB	1	`31067a03dcf5…`
2025-12-14 10:44 UTC · 2 captures of this ZIP	2025-12	A040586-002	AB	1	`31067a03dcf5…`
2025-08-23 18:47 UTC	2025-08	A040586-001	AB	1	`6a471c1ec25d…`
2025-08-23 18:47 UTC	2025-08	A040586-002	AB	1	`6a471c1ec25d…`
2025-03-22 03:13 UTC · 3 captures of this ZIP	2025-03	A040586-001	AB	1	`fd3edfee7708…`
2025-03-22 03:13 UTC · 3 captures of this ZIP	2025-03	A040586-002	AB	1	`fd3edfee7708…`
2025-02-26 10:13 UTC · 3 captures of this ZIP	2025-02	A040586-001	AB	1	`b8a1b40f171c…`
2025-02-26 10:13 UTC · 3 captures of this ZIP	2025-02	A040586-002	AB	1	`b8a1b40f171c…`
2025-01-19 17:59 UTC · 7 captures of this ZIP	2025-01	A040586-001	AB	1	`03ed91905a0d…`
2025-01-19 17:59 UTC · 7 captures of this ZIP	2025-01	A040586-002	AB	1	`03ed91905a0d…`
2024-12-13 21:23 UTC · 2 captures of this ZIP	2024-12	A040586-001	AB	1	`2680178bc6a6…`
2024-12-13 21:23 UTC · 2 captures of this ZIP	2024-12	A040586-002	AB	1	`2680178bc6a6…`
2024-09-14 05:58 UTC · 2 captures of this ZIP	2024-09	A040586-001	AB	1	`5bbf6a4d5a75…`
2024-09-14 05:58 UTC · 2 captures of this ZIP	2024-09	A040586-002	AB	1	`5bbf6a4d5a75…`
2024-11-08 22:44 UTC · 3 captures of this ZIP	2024-11	A040586-001	AB	1	`d8e5a09893c0…`
2024-11-08 22:44 UTC · 3 captures of this ZIP	2024-11	A040586-002	AB	1	`d8e5a09893c0…`
2024-10-29 15:01 UTC	2024-10	A040586-001	AB	1	`d06236e962d9…`
2024-10-29 15:01 UTC	2024-10	A040586-002	AB	1	`d06236e962d9…`
2024-08-13 05:28 UTC · 3 captures of this ZIP	2024-08	A040586-001	AB	1	`79d66fd596c7…`
2024-08-13 05:28 UTC · 3 captures of this ZIP	2024-08	A040586-002	AB	1	`79d66fd596c7…`
2024-07-13 05:37 UTC · 2 captures of this ZIP	2024-07	A040586-001	AB	1	`301d65b070ca…`
2024-07-13 05:37 UTC · 2 captures of this ZIP	2024-07	A040586-002	AB	1	`301d65b070ca…`
2024-06-18 03:08 UTC · 5 captures of this ZIP	2024-06	A040586-001	AB	1	`1e350fbaab3a…`
2024-06-18 03:08 UTC · 5 captures of this ZIP	2024-06	A040586-002	AB	1	`1e350fbaab3a…`
2024-05-31 18:47 UTC	2024-05	A040586-001	AB	1	`8072bd15b7f6…`
2024-05-31 18:47 UTC	2024-05	A040586-002	AB	1	`8072bd15b7f6…`
2022-06-29 02:47 UTC · 2 captures of this ZIP	2022-06	A040586-001	AB	1	`5c6f7cd8ea54…`
2022-06-29 02:47 UTC · 2 captures of this ZIP	2022-06	A040586-002	AB	1	`5c6f7cd8ea54…`
2022-04-08 23:34 UTC	2022-04	A040586-001	AB	1	`5d02ea3f76ae…`
2022-04-08 23:34 UTC	2022-04	A040586-002	AB	1	`5d02ea3f76ae…`
2022-04-04 05:41 UTC	2022-04	A040586-001	AB	1	`4b0b4de00fa7…`
2022-04-04 05:41 UTC	2022-04	A040586-002	AB	1	`4b0b4de00fa7…`
2019-12-13 00:20 UTC	2019-12	A040586-001	AB	1	`74a2ff9319b5…`
2019-12-13 00:20 UTC	2019-12	A040586-002	AB	1	`74a2ff9319b5…`
2022-03-09 01:35 UTC	2022-03	A040586-001	AB	1	`bb7c543d1eb4…`
2022-03-09 01:35 UTC	2022-03	A040586-002	AB	1	`bb7c543d1eb4…`

Additional Listing Data#

Finished product: Yes
Brand name base: Primidone
Listing expiration: 2026-12-31

Active Ingredients#

Ingredient, Strength table
Ingredient	Strength
PRIMIDONE	250 mg/1

Harmonized UNII identifiers#

UNII identifiers page 1 of 1 · 1 matching rows.

Identifier, FDA.report destination table
Identifier	FDA.report destination
13AFD7670Q	Internal UNII lookup

Harmonized RxCUI identifiers#

RxCUI identifiers page 1 of 1 · 2 matching rows.

Identifier, FDA.report destination table
Identifier	FDA.report destination
96304	Internal RxNorm lookup
198150	Internal RxNorm lookup

Harmonized SPL set identifiers#

SPL set identifiers page 1 of 1 · 1 matching rows.

Identifier, FDA.report destination table
Identifier	FDA.report destination
0193c0a4-f593-609c-e063-6294a90aaa68	Available on FDA.report

DailyMed Product Concepts#

Product concept, Relation, Version table
Product concept	Relation	Version	Effective
3a6e0ba9-1dda-c47a-a8e3-5844e445a4f8	Product name	3	20250114
594e2c86-3079-4e6e-96c9-48f7a8afc78d	Product name	1	20230718

DailyMed Package Descriptions#

Package NDC, Product, Description table
Package NDC	Product	Description	Form	Quantity	SPL version
72789-177-01	Primidone	100 in 1 BOTTLE, PLASTIC	TABLET	100	19
72789-177-82	Primidone	500 in 1 BOTTLE, PLASTIC	TABLET	500	19
72789-177-30	Primidone	30 in 1 BOTTLE, PLASTIC	TABLET	30	9

DailyMed Billing Units#

Package NDC, Billing unit, Product NDC table
Package NDC	Billing unit	Product NDC	DailyMed indexing SPL	SPL version	Effective
72789-177-01	EA - Each	72789-177	c1f0d009-cf4e-4a91-bc38-617739f88974	1	2021-05-05
72789-177-30	EA - Each	72789-177	ae4322ed-198c-4746-83dd-bcc3340a3332	1	2023-09-05
72789-177-82	EA - Each	72789-177	726a670b-db15-4853-9b3d-af0cb938e96b	1	2021-07-15

DailyMed Dashboard NDC Coverage#

NDC, Dashboard title, SPL version table
NDC	Dashboard title	SPL version	Validation	Dashboard ZIP
72789-177	PRIMIDONE TABLET [PD-RX PHARMACEUTICALS, INC.]	18	Current NDC, Legacy NDC, 2 package rows	20240915_6046e4e9-0c1e-4d1f-85fa-d2ce25c5dc34.zip
72789-177	PRIMIDONE TABLET [PD-RX PHARMACEUTICALS, INC.]	8	Current NDC, Legacy NDC, 1 package rows	20250316_0193c0a4-f593-609c-e063-6294a90aaa68.zip

openFDA label cross-check#

OpenFDA label data provides additional search and identifier links. DailyMed’s Structured Product Label is the canonical label on FDA.report. Matching records are deduplicated before they are shown below.

Matched openFDA labels page 1 of 1 · 8 matching rows.

Brand, Generic, Manufacturer table
Brand	Generic	Manufacturer	SPL set ID	Effective date	Available safety fields	Join
Primidone	PRIMIDONE	Proficient Rx LP	db761e34-8573-4f96-872c-e851b3004e5e	2026-01-01	Warnings, Adverse reactions	Exact identifier application applno (ANDA): 040586 application number: ANDA040586
Primidone	PRIMIDONE	PD-Rx Pharmaceuticals, Inc.	6046e4e9-0c1e-4d1f-85fa-d2ce25c5dc34	2025-10-20	Warnings, Adverse reactions	Exact identifier application applno (ANDA): 040586 application number: ANDA040586 ndc (product): 72789-177
Primidone	PRIMIDONE	PD-Rx Pharmaceuticals, Inc.	0193c0a4-f593-609c-e063-6294a90aaa68	2025-06-10	Warnings, Adverse reactions	Exact identifier application applno (ANDA): 040586 application number: ANDA040586 ndc (product): 72789-177
PRIMIDONE	PRIMIDONE	DIRECT RX	c20f803c-e965-9dd8-e053-2995a90a92ba	2025-01-17	Warnings, Adverse reactions	Exact identifier application applno (ANDA): 040586 application number: ANDA040586
Primidone	PRIMIDONE	Bryant Ranch Prepack	5067ff85-07f5-424c-b072-6907891e7b4e	2024-05-23	Warnings, Adverse reactions	Exact identifier application applno (ANDA): 040586 application number: ANDA040586
Primidone	PRIMIDONE	Oxford Pharmaceuticals, LLC	439096a4-c5d5-4ad8-be9c-238973a3e290	2022-04-05	Warnings, Adverse reactions	Exact identifier application applno (ANDA): 040586 application number: ANDA040586
Primidone	PRIMIDONE	Aphena Pharma Solutions - Tennessee, LLC	91de277e-34b8-4ee1-8846-f02aea626089	2021-10-15	Warnings, Adverse reactions	Exact identifier application applno (ANDA): 040586 application number: ANDA040586
Primidone	PRIMIDONE	Aphena Pharma Solutions - Tennessee, LLC	70b93341-ce93-4be5-a782-87c1a26129d7	2021-08-19	Warnings, Adverse reactions	Exact identifier application applno (ANDA): 040586 application number: ANDA040586

UNII, Preferred term, Registry number table
UNII	Preferred term	Registry number	Matched term
13AFD7670Q	PRIMIDONE	125-33-7	PRIMIDONE

DailyMed RxNorm Mappings#

RxCUI, RxNorm string, TTY table
RxCUI	RxNorm string	TTY	DailyMed	SPL version
96304	primidone 250 MG Oral Tablet	PSN	6046e4e9-0c1e-4d1f-85fa-d2ce25c5dc34	19
198150	primidone 50 MG Oral Tablet	PSN	6046e4e9-0c1e-4d1f-85fa-d2ce25c5dc34	19
96304	primidone 250 MG Oral Tablet	SCD	6046e4e9-0c1e-4d1f-85fa-d2ce25c5dc34	19
198150	primidone 50 MG Oral Tablet	SCD	6046e4e9-0c1e-4d1f-85fa-d2ce25c5dc34	19
96304	primidone 250 MG Oral Tablet	PSN	0193c0a4-f593-609c-e063-6294a90aaa68	9
198150	primidone 50 MG Oral Tablet	PSN	0193c0a4-f593-609c-e063-6294a90aaa68	9
96304	primidone 250 MG Oral Tablet	SCD	0193c0a4-f593-609c-e063-6294a90aaa68	9
198150	primidone 50 MG Oral Tablet	SCD	0193c0a4-f593-609c-e063-6294a90aaa68	9

Packages#

Package NDC, 11-digit format, Description table
Package NDC	11-digit format	Description	Units	Marketing start	Marketing end	Sample	Exclude flag	Status
72789-177-01	72789017701	100 TABLET in 1 BOTTLE, PLASTIC (72789-177-01)	100 tablet	2021-03-30	0000-00-00	No	No	Current
72789-177-30	72789017730	30 TABLET in 1 BOTTLE, PLASTIC (72789-177-30)	30 tablet	2023-07-28		No	No	Current
72789-177-82	72789017782	500 TABLET in 1 BOTTLE, PLASTIC (72789-177-82)	500 tablet	2021-06-22	0000-00-00	No	No	Current

Title, Manufacturer, Effective date table
Title	Manufacturer	Effective date	Type	Version
PRIMIDONE TABLETS, USP 50 mg and 250 mg Anticonvulsant Rx only	PD-Rx Pharmaceuticals, Inc.	2025-10-20	HUMAN PRESCRIPTION DRUG LABEL	19
PRIMIDONE TABLETS, USP 50 mg and 250 mg Anticonvulsant Rx only	PD-Rx Pharmaceuticals, Inc.	2025-06-10	HUMAN PRESCRIPTION DRUG LABEL	9