How much does Dextromethorphan/Guaifenesin cost without insurance?

We compare cash prices for Dextromethorphan/Guaifenesin live across verified pharmacies on the drug page, the current lowest price is shown there. Cash prices are unregulated and vary by pharmacy, so compare before you fill and confirm the price at the counter.

Is there a generic for Dextromethorphan/Guaifenesin?

Yes. Dextromethorphan/Guaifenesin is the generic; it is also sold under brand names such as Robitussin DM. The generic is typically far cheaper than brand and is what our verified cash prices reflect.

Why does the price of Dextromethorphan/Guaifenesin vary so much between pharmacies?

U.S. cash prescription prices are unregulated, each pharmacy sets its own markup, and discount programs and mail-order sources widen the spread further (this is common across the Cough/Cold class). That's why comparing verified prices before you fill can save money.

Cough/ColdGeneric available

Dextromethorphan/Guaifenesin

Sold as Robitussin DM

Dextromethorphan/Guaifenesin (sold as Robitussin DM) is used for: Cough suppressant + expectorant.

Compare prices →~$5.49 / mo (generic, NADAC)

As of August 2026, Dextromethorphan/Guaifenesin (10/100 mg/5mL) cash prices are compared live across verified pharmacies and mail-order pharmacies on BetterBuyRx, see the current numbers on the drug page below. Prices change; confirm at the counter.

Save with the free BetterBuyRx card

The BetterBuyRx discount card is free, no signup, no insurance needed. When a partner network prices Dextromethorphan/Guaifenesin, the card price appears live on the drug page with its BIN, PCN, Group, and Member ID. Show the card at the pharmacy counter; it can't be combined with insurance.

Get the free card →Dextromethorphan/Guaifenesin coupon & card price →

Frequently asked questions

How much does Dextromethorphan/Guaifenesin cost without insurance?: We compare cash prices for Dextromethorphan/Guaifenesin live across verified pharmacies on the drug page, the current lowest price is shown there. Cash prices are unregulated and vary by pharmacy, so compare before you fill and confirm the price at the counter.
Is there a generic for Dextromethorphan/Guaifenesin?: Yes. Dextromethorphan/Guaifenesin is the generic; it is also sold under brand names such as Robitussin DM. The generic is typically far cheaper than brand and is what our verified cash prices reflect.
Can I use the free BetterBuyRx discount card for Dextromethorphan/Guaifenesin?: Yes. The free BetterBuyRx discount card is compared live on the drug page and, when a partner network prices Dextromethorphan/Guaifenesin, shows the card price with its BIN, PCN, Group, and Member ID. It can't be combined with insurance.
Why does the price of Dextromethorphan/Guaifenesin vary so much between pharmacies?: U.S. cash prescription prices are unregulated, each pharmacy sets its own markup, and discount programs and mail-order sources widen the spread further (this is common across the Cough/Cold class). That's why comparing verified prices before you fill can save money.

We're still expanding this entry. For full prescribing information, see the FDA label below.

Clinical content reviewed by the BetterBuyRx clinical team.

Educational only. Not medical advice. Always confirm with your prescriber or pharmacist.