Histafed LA Side Effects

Generic name: chlorpheniramine / pseudoephedrine

Medically reviewed by Drugs.com. Last updated on Jan 1, 2024.

Note: This document provides detailed information about Histafed LA Side Effects associated with chlorpheniramine / pseudoephedrine. Some dosage forms listed on this page may not apply specifically to the brand name Histafed LA.

Applies to chlorpheniramine / pseudoephedrine: oral liquid, oral suspension extended release, oral tablet, oral tablet chewable.

Important warnings This medicine can cause some serious health issues

Do not use this medicine if you have used an MAO inhibitor in the past 14 days, such as isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, or tranylcypromine.

You should not use antihistamine medication to make a child sleepy.

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:

• chest pain, rapid pulse, fast or uneven heart rate;

• confusion, hallucinations, severe nervousness;

• tremor, seizure (convulsions);

• little or no urinating;

• easy bruising or bleeding, unusual weakness; or

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

Side effects such as dry mouth, constipation, and confusion may be more likely in older adults.

Common side effects may include:

• dizziness, drowsiness, blurred vision;

• dry nose or mouth;

• nausea, stomach pain, constipation, loss of appetite;

• problems with memory or concentration; or

• feeling restless or excited (especially in children).

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

Further information

Histafed LA 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