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PERMITIL vs PROMETHEGAN

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated August 20, 2026·How we rate

Possible drug interaction. PERMITIL 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.

Rating

New
70/100

Pharmacy pays

~$11.42 /30
~$1.53 /30

Type

RX
RX

Active ingredient

FLUPHENAZINE HYDROCHLORIDE
PROMETHAZINE HYDROCHLORIDE

Manufacturer

Dosage forms

Tablet
Suppository

Drug class

Phenothiazine
Phenothiazine

Boxed warning

Half-life

about 9 to 16 hours

Treats

Psychotic Disorders, Schizophrenia
Anaphylaxis, Allergic Conjunctivitis, Motion Sickness

Frequently asked questions

Which is cheaper, Permitil or Promethegan?

Promethegan costs pharmacies less to acquire — about $1.53 vs $11.42 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 Permitil and Promethegan?

Permitil contains Fluphenazine 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.