Guaifenesin 1,200 mg / Dextromethorphan HBr 60 mg Extended-Release (DM Maximum Strength)
Mucinex and its twins. Cough suppressant / Expectorant. Active ingredients: Dextromethorphan HBr 60 mg + Guaifenesin 1200 mg.
18 options at Costco, Walmart, Amazon, CVS, Target, Walgreens, Kroger. Cheapest: 29¢ per pill; typical Mucinex: $1.21 per pill. Prices are estimates from Oct 2026.
Cheapest options
- Kirkland Signature Mucus DM Maximum Strength ER Tablets — Costco, 84 tablets, $23.99 (29¢ per pill)
- Equate Maximum Strength Mucus Relief DM ER Tablets — Walmart, 28 tablets, $18.97 (68¢ per pill)
- Amazon Basic Care Mucus DM Maximum Strength ER Tablets — Amazon, 14 tablets, $10.99 (79¢ per pill)
- Equate Maximum Strength Mucus Relief DM ER Tablets — Walmart, 14 tablets, $11.47 (82¢ per pill)
- CVS Health Maximum Strength Mucus DM ER Tablets — CVS, 42 tablets, $34.99 (83¢ per pill)
- up&up Maximum Strength Mucus Relief DM ER Tablets — Target, 14 tablets, $12.49 (89¢ per pill)
- Walgreens Maximum Strength Mucus Relief DM ER Tablets — Walgreens, 28 tablets, $25.99 (93¢ per pill)
- Mucinex DM Maximum Strength 12 Hour Expectorant & Cough Suppressant — Walmart, 28 tablets, $26.97 (96¢ per pill)
Where to find it
Look for the “Cough, Cold & Flu” aisle sign.
Good to know
- Each tablet has twice the guaifenesin and twice the dextromethorphan of a regular Mucinex DM tablet (600 mg / 30 mg).
- Dextromethorphan is also the cough suppressant in Delsym, DayQuil and NyQuil — check labels so you don't take it twice.
- Costco's Kirkland Signature Mucus DM is listed with the FDA at the same 1,200 mg / 60 mg strength, in an 84-tablet bottle.