Deconex DMX Coupons & Prices

Deconex DMX (dextromethorphan, phenylephrine, guaifenesin) is a brand-name prescription combination drug prescribed to treat symptoms due to cold, hay fever, and other upper respiratory allergies. The active ingredients in Deconex DMX suppress coughing, relieve nasal congestion, and help thin out mucus and phlegm so that it is more easily coughed up. Deconex DMX is taken as a tablet. Deconex DMX usually retails for $34.99, but a SingleCare Deconex DMX coupon reduces Deconex DMX price to $25.44.

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Deconex DMX coupon at Kroger Pharmacy
$ 25.44

Show this free card to your pharmacist.

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Deconex DMX coupon at Harris Teeter Pharmacy
$ 25.44
Deconex DMX coupon at Costco Pharmacy
$ 26.34
Deconex DMX coupon at Food Lion Pharmacy
$ 28.61
Deconex DMX coupon at Walgreens Pharmacy
$ 38.63

About SingleCare Pricing

SingleCare’s prescription prices are based on multiple sources. The prices we publish are our best estimate, but we cannot guarantee that the price we display will exactly match the price you receive at the pharmacy. For an exact price, please contact your pharmacy and provide the BIN/GRP/PCN numbers shown on your SingleCare card.

Any SingleCare bonus savings, including the $3 signup bonus, may only be used once.

Prices updated: 12/05/2025

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About Deconex DMX

Deconex DMX (dextromethorphan, phenylephrine, guaifenesin) is a brand-name prescription combination drug prescribed to treat symptoms due to cold, hay fever, and other upper respiratory allergies. The active ingredients in Deconex DMX suppress coughing, relieve nasal congestion, and help thin out mucus and phlegm so that it is more easily coughed up. Deconex DMX is taken as a tablet. Deconex DMX usually retails for $34.99, but a SingleCare Deconex DMX coupon reduces Deconex DMX price to $25.44.

Deconex DMX Price History & Information

Price History for Deconex Dmx

30 count, tablet, 10-17.5-400mg

Our price history metrics are calculated from aggregate prescription data that we receive from all participating pharmacies. This chart updates daily to show new price fluctuations. If a data point is missing from the chart, it is because we do not have enough data to produce a reliable figure.

Average 1-Month Prices for Deconex Dmx

30 count, tablet, 10-17.5-400mg
PharmacyDeconex Dmx Retail PriceDeconex Dmx SingleCare Price
Walmart$24.90$24.90
Walgreens$32.70$32.70
Kroger Pharmacy$28.50$25.50

These prices are based on the last month of SingleCare prescription fill data by major pharmacy. This table updates daily to show the most accurate typical prices by pharmacies. If a data point is missing from the table, it is because we do not have enough data to produce a reliable figure.

About Deconex DMX

Deconex DMX (dextromethorphan, phenylephrine, guaifenesin) is a brand-name prescription combination drug prescribed to treat symptoms due to cold, hay fever, and other upper respiratory allergies. The active ingredients in Deconex DMX suppress coughing, relieve nasal congestion, and help thin out mucus and phlegm so that it is more easily coughed up. Deconex DMX is taken as a tablet. Deconex DMX usually retails for $34.99, but a SingleCare Deconex DMX coupon reduces Deconex DMX price to $25.44.

Deconex DMX FAQs

How much does Deconex DMX cost without insurance?

The retail price of Deconex DMX for uninsured patients is usually $34.99. You could pay $25.44 per 30, 10-17.5-400mg tablets for a Deconex DMX prescription using a SingleCare discount card at major pharmacies across the country.

How much does Deconex DMX cost with insurance?

Copay costs of Deconex DMX may vary. With SingleCare, Deconex DMX costs as little as $25.44 for 30, 10-17.5-400mg tablets. Ask your pharmacist to compare your insurance copay to your price using a SingleCare discount card. Your SingleCare Deconex DMX coupon may save you more money than insurance does at participating pharmacies.

Does Medicare cover Deconex DMX and how much does it cost?

Medicare Part D and Medicare guaifenesin usually do not cover Deconex DMX. For Medicare patients, SingleCare offers Deconex DMX coupons that reduce the cost of Deconex DMX to $25.44.

Is there a generic of Deconex DMX?

Deconex DMX is a brand-name prescription drug with dextromethorphan, guaifenesin, and phenylephrine as the active ingredients. All of these ingredients are available separately or in combination with other brand-name or generic cough and cold products. There is, however, no generic version of Deconex DMX combining all three.

What is Deconex DMX?

Deconex DMX is a brand-name prescription combination drug for treating the symptoms of colds, hay fever, and other upper respiratory allergies. Deconex DMX suppresses coughing (antitussive), loosens phlegm and mucus (expectorant), and reduces nasal swelling (nasal decongestant).

The active ingredients in Deconex DMX are dextromethorphan, guaifenesin, and phenylephrine. Dextromethorphan is an opioid that reduces coughing by slowing down the part of the brain that causes coughing. Guaifenesin belongs to a class of drugs called expectorants, which reduce nasal and airway congestion by loosening the mucus that builds up inside the airways. Phenylephrine is a decongestant that reduces the swelling of blood vessels in the nose.

Deconex DMX is taken as a tablet every four hours. The dose will depend on the age of the patient.

What are the side effects of Deconex DMX?

Dextromethorphan, one of the active ingredients in Deconex DMX, is an opioid, so commonly experienced side effects will include drowsiness, dizziness, and lightheadedness. Other common side effects of Deconex DMX include, but are not limited to, diarrhea, headache, nausea, and trouble sleeping Mental and mood changes include restlessness, nervousness, excitability, and irritability.

Dextromethorphan is an addictive drug that is often abused. Overdosing on Deconex DMX will slow down breathing, lower blood pressure, and could result in unconsciousness, coma, or death, especially in small children. Do not exceed the prescribed dose.

Allergic reactions are very rare.

This is not a complete list of side effects. Consult with your physician or pharmacist about possible side effects before starting Deconex DMX.

Where are Deconex DMX coupons from SingleCare accepted?

SingleCare is accepted at most national pharmacies and grocers, including the following:

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