Deconex DM Side Effects Center

What Is Deconex DM?

Deconex DM (dextromethorphan hydrobromide, guaifenesin, phenylephrine hydrochloride capsule) 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 DM is available over-the-counter (OTC).

What Are Side Effects of Deconex DM?

Common side effects of Deconex DM include:

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

Dosage for Deconex DM

The dose of Deconex DM for adults and children 12 years of age and over is 1 capsule every 4 hours, not to exceed 6 capsules in 24 hours.

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

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

Deconex DM During Pregnancy or Breastfeeding

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

Additional Information

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

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using this medicine and call your doctor at once if you have:

• little or no urination;
• fast or slow heartbeats;
• confusion, severe dizziness, feeling unsteady;
• severe nausea or vomiting;
• severe headache, blurred vision, pounding in your neck or ears;
• slow breathing; or
• unusual changes in mood or behavior.

Common side effects may include:

• diarrhea, constipation;
• dizziness, drowsiness;
• sleep problems (insomnia); or
• feeling nervous, restless, or irritable.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.