PHENERGAN vs PROMETHEGAN
Independent side-by-side comparison.
Rating
New
70/100
Pharmacy pays
~$1.53 /30
~$1.53 /30
Type
RX
RX
Active ingredient
PROMETHAZINE HYDROCHLORIDE
PROMETHAZINE HYDROCHLORIDE
Manufacturer
Dosage forms
Injectable
Suppository
Drug class
Phenothiazine
Phenothiazine
Boxed warning
Half-life
about 9 to 16 hours
about 9 to 16 hours
Treats
Anaphylaxis, Allergic Conjunctivitis, Motion Sickness
Anaphylaxis, Allergic Conjunctivitis, Motion Sickness
Frequently asked questions
Which is cheaper, Phenergan or Promethegan?
Pharmacies pay about the same to acquire either one — roughly $1.53 for a 30-count supply, per the CMS NADAC survey. That is not what you will be charged: your price is set by your insurer and the pharmacy, not by what the drug cost them.
What is the difference between Phenergan and Promethegan?
Both Phenergan and Promethegan share the active ingredient Promethazine Hydrochloride.
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.