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Deconex DMX Tablet (Dextromethorphan Hydrobromide, Guaifenesin, Phenylephrine): Side Effects, Uses, Dosage, Interactions, Warnings

Deconex DMX

Medical Editor: John P. Cunha, DO, FACOEP Last updated on RxList: 2/8/2022

Drug Summary

What Is Deconex DMX?

Deconex DMX (dextromethorphan hydrobromide, guaifenesin, phenylephrine hydrochloride tablet) is a combination of a cough suppressant, an expectorant, and a nasal decongestant indicated to temporarily relieves the following symptoms due to the common cold, hay fever (allergic rhinitis) or other upper respiratory allergies: eases cough due to minor throat and bronchial irritation, helps loosen phlegm (mucus) and thin bronchial secretions to drain bronchial tubes and make coughs more productive, relieves nasal congestion, and reduces swelling of nasal passages. Deconex DMX is available over-the-counter (OTC).

What Are Side Effects of Deconex DMX?

Common side effects of Deconex DMX include:

  • dizziness,
  • drowsiness,
  • diarrhea,
  • headache,
  • nausea,
  • trouble sleeping (insomnia),
  • nervousness,
  • restlessness,
  • excitability, or
  • irritability.

Dosage for Deconex DMX

The dose of Deconex DMX for adults and children 12 years of age and over is 1 tablet every 4 hours, not to exceed 6 tablets in 24 hours. The dose of Deconex DMX for children 6 to under 12 years of age is ½ tablet every 4 hours, not to exceed 3 tablets in 24 hours.

What Drugs, Substances, or Supplements Interact with Deconex DMX?

Deconex DMX may interact with monoamine oxidase inhibitors (MAOIs). Tell your doctor all medications and supplements you use.

Deconex DMX During Pregnancy or Breastfeeding

Tell your doctor if you are pregnant or plan to become pregnant before using Deconex DMX. Consult your doctor before breastfeeding.

Additional Information

Our Deconex DMX (dextromethorphan hydrobromide, guaifenesin, phenylephrine hydrochloride tablet) Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

Description for Deconex DMX Tablet

Drug Facts

Active Ingredients

Dextromethorphan HBr 17.5 mg
Guaifenesin 385 mg
Phenylephrine HCl 10 mg

Uses for Deconex DMX Tablet

Purpose (in each tablet)

  • Cough Suppressant
  • Expectorant
  • Nasal Decongestant

Uses

Temporarily relieves these symptoms due to the common cold, hay fever (allergic rhinitis) or other upper respiratory allergies:

  • cough due to minor throat and bronchial irritation
  • helps loosen phlegm (mucus) and thin bronchial secretions to drain bronchial tubes and make coughs more productive
  • nasal congestion
  • reduces swelling of nasal passages

Dosage for Deconex DMX Tablet

Directions

Do not exceed recommended dosage.

Adults and children 12 years of age and over: 1 tablet every 4 hours, not to exceed 6 tablets in 24 hours.

Children 6 to under 12 years of age: ½ tablet every 4 hours, not to exceed 3 tablets in 24 hours.

Children under 6 years of age: Consult a physician.

HOW SUPPLIED

Other Information

Store at controlled room temperature between 15°-30°C (59°-86°F).

Supplied in a tight, light-resistant container with a child-resistant cap. Deconex DMX Tablets are orange, oblong, capsule-shaped, scored tablets, debossed "POLY" bisect "730" on one side and blank on the other side.

NDC 50991-738-90

Inactive Ingredients

FD&C Yellow No. 6, D&C Yellow No. 10, Magnesium Stearate, Microcrystalline Cellulose, Sodium Starch Glycolate.

Questions? Comments? Call 1-800-882-1041

Manufactured for: Poly Pharmaceuticals, Huntsville, AL 35763. 1(800) 882-1041. Revised: Jun 2016

Side Effects for Deconex DMX Tablet

No information provided. Please see the WARNINGS AND PRECAUTIONS sections

Drug Interactions for Deconex DMX Tablet

No information provided.

Warnings for Deconex DMX Tablet

Included as part of the PRECAUTIONS section.

Precautions for Deconex DMX Tablet

Do not exceed recommended dosage.

Do not use this product

Ask a doctor before use if you have

Stop use and ask a doctor if

  • nervousness, dizziness, or sleeplessness occur
  • cough or nasal congestion persists for more than 1 week, tends to recur, or is accompanied by a fever, rash, or persistent headache. A persistent cough may be a sign of a serious condition.
  • new symptoms occur

If pregnant or breast feeding, ask a health professional before use.

Keep out of reach of children.

In case of overdose, get medical help or contact a Poison Control Center right away.

Overdose Information for Deconex DMX Tablet

No information provided.

Contraindications for Deconex DMX Tablet

No information provided.

Clinical Pharmacology for Deconex DMX Tablet

No information provided.

Patient Information for Deconex DMX Tablet

Do not exceed recommended dosage.

Do not use this product

  • if you are now taking a prescription monoamine oxidase inhibitor (MAOI) (certain drugs for depression, psychiatric, or emotional conditions, or Parkinson's disease), or for 2 weeks after stopping the MAOI drug. If you do not know if your prescription drug contains an MAOI, ask a doctor or pharmacist before taking this product.

Ask a doctor before use if you have

  • a cough that lasts or is chronic such as occurs with smoking, asthma, chronic bronchitis, or emphysema
  • a cough that occurs with too much phlegm (mucus)
  • heart disease
  • high blood pressure
  • thyroid disease
  • diabetes
  • trouble urinating due to an enlarged prostate gland

Stop use and ask a doctor if

  • nervousness, dizziness, or sleeplessness occur
  • cough or nasal congestion persists for more than 1 week, tends to recur, or is accompanied by a fever, rash, or persistent headache. A persistent cough may be a sign of a serious condition.
  • new symptoms occur

If pregnant or breast feeding, ask a health professional before use.

Keep out of reach of children.

In case of overdose, get medical help or contact a Poison Control Center right away.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.