Decon-A Side Effects

Generic name: brompheniramine / phenylephrine

Medically reviewed by Drugs.com. Last updated on May 12, 2025.

Note: This document provides detailed information about Decon-A Side Effects associated with brompheniramine / phenylephrine. Some dosage forms listed on this page may not apply specifically to the brand name Decon-A.

Applies to brompheniramine / phenylephrine: oral liquid, oral tablet.

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

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

• nervousness, dizziness, or sleeplessness;

• chest pain, fast or uneven heart rate;

• little or no urinating;

• dangerously high blood pressure (severe headache, buzzing in your ears, anxiety, shortness of breath);

• if your symptoms do not improve after 7 days of treatment, or if you have a fever; or

• if new symptoms occur.

Less serious side effects may be more likely, and you may have none at all.

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 brompheniramine/phenylephrine: oral capsule extended release, oral elixir, oral liquid, oral suspension extended release, oral tablet, oral tablet chewable, oral tablet chewable extended release, oral tablet extended release.

General adverse events

The manufacturer has not provided adverse event information.^[Ref]

See also:

Further information

Decon-A side effects can vary depending on the individual. Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Note: Medication side effects may be underreported. If you are experiencing side effects that are not listed, submit a report to the FDA by following this guide.

Medical Disclaimer