FLAGYL vs FLAGYL ER
Independent side-by-side comparison.
Rating
64/100
64/100
Pharmacy pays
$0.10 /g
$0.10 /g
Type
RX
RX
Active ingredient
METRONIDAZOLE
METRONIDAZOLE
Dosage forms
Capsule
Tablet, extended release
Drug class
Nitroimidazole Antimicrobial
Nitroimidazole Antimicrobial
Boxed warning
None
None
Half-life
about 8 hours
about 8 hours
Treats
Abscess, Amebiasis, Bacteroides Infections
Abscess, Amebiasis, Bacteroides Infections
Frequently asked questions
Which is better-rated, Flagyl or Flagyl ER?
Flagyl and Flagyl ER are tied at 3.2 out of 5 by our independent rating.
Which is cheaper, Flagyl or Flagyl ER?
Pharmacies pay about the same to acquire either one — roughly $0.10 per gm, 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 Flagyl and Flagyl ER?
Both Flagyl and Flagyl ER share the active ingredient Metronidazole.
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.