NalDex Side Effects

Generic name: dexchlorpheniramine / phenylephrine

Note: This document contains side effect information about dexchlorpheniramine / phenylephrine. Some of the dosage forms listed on this page may not apply to the brand name NalDex.

Some side effects of NalDex may not be reported. Always consult your doctor or healthcare specialist for medical advice. You may also report side effects to the FDA.

For the Consumer

Applies to dexchlorpheniramine / phenylephrine: oral tablet extended release

Get emergency medical help if you have any of these signs of an allergic reaction while taking dexchlorpheniramine / phenylephrine: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Stop using dexchlorpheniramine and phenylephrine and call your doctor at once if you have a serious side effect such as:

• fast or uneven heart rate;

• mood changes;

• tremor, seizure (convulsions);

• easy bruising or bleeding, unusual weakness;

• urinating less than usual or not at all;

• feeling short of breath; or

• dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, chest pain, uneven heartbeats, seizure).

Less serious side effects of dexchlorpheniramine / phenylephrine may include:

• dizziness, drowsiness;

• dry mouth, nose, or throat;

• constipation;

• blurred vision; or

• feeling nervous or restless.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects.

For Healthcare Professionals

Applies to dexchlorpheniramine / phenylephrine: oral tablet extended release

Gastrointestinal

Gastrointestinal side effects have included nausea, dry mouth, anorexia, and heartburn.

Nervous system

Nervous system side effects have included headache, dizziness, mild sedation, tremor, weakness, insomnia, drowsiness, restlessness, convulsions, central nervous system depression, and nervousness.

Genitourinary

Genitourinary side effects have included dysuria.

Psychiatric

Psychiatric side effects have included fear, anxiety, and tenseness.

Cardiovascular

Cardiovascular side effects have included pallor, tachycardia, palpitations, arrhythmias, and cardiovascular collapse with hypotension.

Respiratory

Respiratory side effects have included respiratory difficulty.

Dermatologic

Dermatologic side effects have included very rare reports of dermatitis.

Ocular

Ocular side effects have included blurring of vision.

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