Guaifenesin-Dextromethorphan

Medically Reviewed by Dr. Harshi Dhingra, M.D.

Last Reviewed: May 25, 2023

Common Questions


Common Questions about Dextromethorphan - Guaifenesin


What is DM in cough medicine?

DM in cough medicine is often used to indicate that it contains the cough suppressant dextromethorphan along with other ingredients. Some cough medicines have the suffix “D,” which might indicate a decongestant such as pseudoephedrine.



How quickly does dextromethorphan and guaifenesin start working?

Dextromethorphan and guaifenesin start working within 15-30 minutes of taking a dose.



Can you take dextromethorphan and guaifenesin every day?

Dextromethorphan and guaifenesin is for short-term treatment of cough. You can take it every day for up to 7 days. If your cough is still present after a week or goes away but comes back, ask a doctor for advice. There may be something more serious going on that this medication cannot treat.



Is dextromethorphan and guaifenesin good for dry cough?

Dextromethorphan is a cough suppressant and can provide temporary relief from a dry cough. Guaifenesin is an expectorant that loosens mucus. There may be other better cough medications for a dry cough. Ask a doctor or pharmacist if you are unsure what to take for a dry cough.



What is the price of dextromethorphan and guaifenesin without insurance?

Without insurance, dextromethorphan and guaifenesin can be as high as $15.99, but with a free BuzzRx prescription discount coupon, you could pay as low as $10.30 for the most common version of this medication. Use the BuzzRx drug price look-up tool to find the lowest discounted price, and be sure to enter the correct dosage, form, and quantity for the most accurate pricing. While generics tend to have the best savings, you can also use your BuzzRx card and coupons to purchase brand-name versions. It never hurts to ask your pharmacist to try BuzzRx when filling or refilling any of your prescription drugs—whether you have insurance or not.



What is the price of dextromethorphan and guaifenesin with insurance?

Ask your pharmacist or insurance provider for your copay price on dextromethorphan and guaifenesin—Copay amounts vary depending on the type of insurance plan you have and if there is a deductible to reach before prescription drug coverage begins.

You could save up to 80% on your prescription medication with a free BuzzRx discount coupon for dextromethorphan and guaifenesin. When using the BuzzRx lookup tool to find the price of your medicine, be sure to enter the correct dosage, form, and quantity to receive the most accurate discounted pricing. It never hurts to ask your pharmacist to try BuzzRx when filling or refilling any of your prescriptions—whether you have insurance or not.