Last Updated: May 3, 2026

PHERAZINE W Drug Patent Profile

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Which patents cover Pherazine W, and when can generic versions of Pherazine W launch?

Pherazine W is a drug marketed by Halsey and is included in one NDA.

The generic ingredient in PHERAZINE W is codeine phosphate; promethazine hydrochloride. There are nineteen drug master file entries for this compound. Five suppliers are listed for this compound. Additional details are available on the codeine phosphate; promethazine hydrochloride profile page.

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Summary for PHERAZINE W

US Patents:	0
Applicants:	1
NDAs:	1

US Patents and Regulatory Information for PHERAZINE W

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Glossary

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Exclusivity Expiration
Halsey	PHERAZINE W/ CODEINE	codeine phosphate; promethazine hydrochloride	SYRUP;ORAL	088739-001	Dec 23, 1988		DISCN	No	No	⤷ Start Trial	⤷ Start Trial				⤷ Start Trial
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Exclusivity Expiration

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