Last Updated: September 24, 2026

Details for New Drug Application (NDA): 019746

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NDA 019746 describes EFIDAC 24 CHLORPHENIRAMINE MALEATE, which is a drug marketed by Alza and is included in one NDA. Additional details are available on the EFIDAC 24 CHLORPHENIRAMINE MALEATE profile page.

The generic ingredient in EFIDAC 24 CHLORPHENIRAMINE MALEATE is chlorpheniramine maleate. There is one drug master file entry for this compound. Two suppliers are listed for this compound. Additional details are available on the chlorpheniramine maleate profile page.

Summary for 019746

Tradename:	EFIDAC 24 CHLORPHENIRAMINE MALEATE
Applicant:	Alza
Ingredient:	chlorpheniramine maleate
Patents:	0

Medical Subject Heading (MeSH) Categories for 019746

Anti-Allergic Agents
Antipruritics
Histamine H1 Antagonists

Profile for product number 002

Active Rx/OTC/Discontinued:	DISCN	Dosage:	TABLET, EXTENDED RELEASE;ORAL			Strength	16MG
Approval Date:	Nov 18, 1994	TE:		RLD:	No

Expired US Patents for NDA 019746

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	Patent No.	Patent Expiration
Alza	EFIDAC 24 CHLORPHENIRAMINE MALEATE	chlorpheniramine maleate	TABLET, EXTENDED RELEASE;ORAL	019746-002	Nov 18, 1994	⤷ Start Trial	⤷ Start Trial
Alza	EFIDAC 24 CHLORPHENIRAMINE MALEATE	chlorpheniramine maleate	TABLET, EXTENDED RELEASE;ORAL	019746-002	Nov 18, 1994	⤷ Start Trial	⤷ Start Trial
Alza	EFIDAC 24 CHLORPHENIRAMINE MALEATE	chlorpheniramine maleate	TABLET, EXTENDED RELEASE;ORAL	019746-002	Nov 18, 1994	⤷ Start Trial	⤷ Start Trial
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>Patent No.	>Patent Expiration

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