CHLORPROMAZINE HYDROCHLORIDE vs PROMETHEGAN

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 21, 2026·How we rate

Possible drug interaction. CHLORPROMAZINE HYDROCHLORIDE and PROMETHEGAN are different prescription medicines. Combining or switching between them can cause interactions — talk to a pharmacist or prescriber before making changes. This page is not medical advice.

Attribute	CHLORPROMAZINE HYDROCHLORIDE	PROMETHEGAN
Rating	New	70/100
Pharmacy pays	~$12.04 /30	~$1.53 /30
Type	RX	RX
Active ingredient	CHLORPROMAZINE HYDROCHLORIDE	PROMETHAZINE HYDROCHLORIDE
Manufacturer	Ivax Sub Teva Pharms	Cosette
Dosage forms	Injectable, Tablet	Suppository
Drug class	Phenothiazine	Phenothiazine
Boxed warning	None	Boxed warning
Half-life	—	about 9 to 16 hours
Treats	Anxiety Disorders, Child Behavior Disorders, Hiccup	Anaphylaxis, Allergic Conjunctivitis, Motion Sickness

chlorpromazine hydrochloride promethegan

Rating

New

70/100

Pharmacy pays

~$12.04 /30

~$1.53 /30

Type

Active ingredient

CHLORPROMAZINE HYDROCHLORIDE

PROMETHAZINE HYDROCHLORIDE

Manufacturer

Ivax Sub Teva Pharms

Cosette

Dosage forms

Injectable, Tablet

Suppository

Drug class

Phenothiazine

Boxed warning

None

Boxed warning

Half-life

—

about 9 to 16 hours

Treats

Anxiety Disorders, Child Behavior Disorders, Hiccup

Anaphylaxis, Allergic Conjunctivitis, Motion Sickness

Frequently asked questions

Which is cheaper, Chlorpromazine Hydrochloride or Promethegan?

Promethegan costs pharmacies less to acquire — about $1.53 vs $12.04 for a 30-count supply, per the CMS NADAC survey. That gap is in the pharmacy's cost of goods, not necessarily in what you pay: your price is set afterwards by your insurer and the pharmacy.

What is the difference between Chlorpromazine Hydrochloride and Promethegan?

Chlorpromazine Hydrochloride contains Chlorpromazine Hydrochloride, while Promethegan contains Promethazine Hydrochloride — they have different active ingredients.

Ratings are based on FDA regulatory (recall-safety) data. This comparison is for general reference only — not medical advice. Always consult a licensed professional before choosing or switching a medication.