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DELSYM vs MUCINEX

Independent side-by-side comparison.

Rated against independent regulatory sources·Last updated June 7, 2026·How we rate

Rating

New
New

Pharmacy pays

$0.07 /mL

Type

OTC
OTC

Active ingredient

DEXTROMETHORPHAN POLISTIREX
GUAIFENESIN

Manufacturer

Dosage forms

Suspension, extended release
Tablet, extended release

Drug class

Expectorant

Boxed warning

None
None

Treats

Cough
Bronchitis, Common Cold, Cough

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Where to buy

Buy over-the-counter from trusted retailers.

Frequently asked questions

What is the difference between Delsym and Mucinex?

Delsym contains Dextromethorphan Polistirex, while Mucinex contains Guaifenesin — 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.