TheraRadar
Data updated: May 26, 2026

PROMETHAZINE DM (dextromethorphan hydrobromide)

Respiratory Approved 2006-02-14

PROMETHAZINE DM is indicated for the treatment of Cough; Allergy; Common Cold.

Source: FDA Label • PAI HOLDINGS
1
Indication
--
Phase 3 Trials
20
Years on Market

Details

Status
Prescription
First Approved
2006-02-14
Routes
ORAL
Dosage Forms
SYRUP

PROMETHAZINE DM Approval History

2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
Original
New Indication
New Form
Label Update
1 FDA actions from 2006 to 2006
Feb 2006 ORIGINAL
Update

What PROMETHAZINE DM Treats

3 indications

PROMETHAZINE DM is approved for 3 conditions since its original approval in 2006. These indications span multiple therapeutic areas including oncology, immunology, and more.

  • Cough
  • Allergy
  • Common Cold
Source: FDA Label

PROMETHAZINE DM Boxed Warning

PROMETHAZINE HYDROCHLORIDE SHOULD NOT BE USED IN PEDIATRIC PATIENTS LESS THAN 2 YEARS OF AGE BECAUSE OF THE POTENTIAL FOR FATAL RESPIRATORY DEPRESSION. POSTMARKETING CASES OF RESPIRATORY DEPRESSION, INCLUDING FATALITIES, HAVE BEEN REPORTED WITH USE OF PROMETHAZINE HYDROCHLORIDE IN PEDIATRIC PATIENTS LESS THAN 2 YEARS OF AGE. A WIDE RANGE OF WEIGHT-BASED DOSES OF PROMETHAZINE HYDROCHLORIDE HAVE RESULTED IN RESPIRATORY DEPRESSION IN THESE PATIENTS. CAUTION SHOULD BE EXERCISED WHEN ADMINISTERING PR...

PROMETHAZINE DM Competitive Set

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Filters applied: drops same-active-ingredient (505(b)(2) reformulations), route-mismatch (topical vs systemic), and cross-therapeutic-area matches in same-indication rings.

Drugs Similar to PROMETHAZINE DM

3 of 12

FDA-approved drugs for similar conditions. Compare mechanisms and indications to understand treatment alternatives.

HYDROCODONE POLISTIREX AND CHLORPHENIRAMINE POLISTIREX
CHLORPHENIRAMINE POLISTIREX
3 shared
TRIS PHARMA INC
Shared indications:
CoughAllergyCommon Cold
PROMETHAZINE HYDROCHLORIDE AND PHENYLEPHRINE HYDROCHLORIDE
PHENYLEPHRINE HYDROCHLORIDE
2 shared
AMNEAL PHARMS
Shared indications:
AllergyCommon Cold
PROMETHAZINE W/ DEXTROMETHORPHAN
DEXTROMETHORPHAN HYDROBROMIDE
2 shared
PHARMOBEDIENT
Shared indications:
Common ColdCough
📋

Clinical Trial Registry

8 trials
Trial Sponsor ID Phase Status Title
NCT02651116 CHPA DXM results posted A6531002 CHPA DXM Ph 4 terminated Dextromethorphan Pediatric Acute Cough Study
NCT03480009 DexMab results posted STUDY19020221 Ph 3 completed Dextromethorphan as a Novel Non-opioid Adjunctive Agent for Pain Control in Medication Abortion
NCT01441102 MiDME2 results posted 110244 11-EI-0244 Ph 1, Ph 2 completed Dextromethorphan for Diabetic Macular Edema
NCT02860962 Pro00052508 Ph 1 completed A Trial of Dextromethorphan for Treatment of Major Depressive Disorder
NCT01218620 NCI-2012-02916 NCI-2012-02916, CDR0000685426 Ph 1 completed Gamma-Secretase/Notch Signalling Pathway Inhibitor RO4929097 in Treating Patients With Advanced Solid Tumors
NCT02182336 1220.32 Ph 1 completed Effects of BI 201335 NA on Cytochrome P450 and P-glycoprotein Activity Using a Probe Drug Cocktail in Healthy Volunteers
NCT01017939 CR017128 COU-AA-015 Ph 1 completed A Drug-Drug Interaction Study of Abiraterone Acetate Plus Prednisone With Dextromethorphan and Theophylline in Patients With Metastatic Castration-Resistant Prostate Cancer
NCT01441986 DXM/AMT 0533-DXM Ph 2 completed Dextromethorphan, Amantadine and Glucose Homeostasis in Diabetes Subjects
🔬

Active Pipeline

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Ongoing clinical trials by development phase

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Key Completed Trials

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Completed studies with published results, ranked by significance

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📊

Trial Timeline

Full development history with FDA approval milestones

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Understanding FDA Approval Types
Count Type What it means
- ORIG Original approval - drug first enters market
- SUPPL - Efficacy New indication (new disease/condition approved)
- SUPPL - Labeling Label text changes (warnings, dosing updates)
- SUPPL - Manufacturing Production changes (new facility)
- SUPPL - Chemistry Formulation changes (new dosage strength)

Green lines in the timeline show ORIG and Efficacy approvals - the clinically meaningful milestones.

PROMETHAZINE DM FDA Label Details

Indications & Usage

PROMETHAZINE DM is indicated for the treatment of Cough; Allergy; Common Cold.

⚠️ BOXED WARNING

WARNING: PROMETHAZINE HYDROCHLORIDE SHOULD NOT BE USED IN PEDIATRIC PATIENTS LESS THAN 2 YEARS OF AGE BECAUSE OF THE POTENTIAL FOR FATAL RESPIRATORY DEPRESSION. POSTMARKETING CASES OF RESPIRATORY DEPRESSION, INCLUDING FATALITIES, HAVE BEEN REPORTED WITH USE OF PROMETHAZINE HYDROCHLORIDE IN PEDIATRIC...

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Data Sources

Data sourced from official FDA and NIH databases. Click links to verify on original sources.