AllerDur Side Effects
Generic name: dexchlorpheniramine / pseudoephedrine
Medically reviewed by Drugs.com. Last updated on Jan 25, 2022.
Note: This document contains side effect information about dexchlorpheniramine / pseudoephedrine. Some of the dosage forms listed on this page may not apply to the brand name AllerDur.
Applies to dexchlorpheniramine / pseudoephedrine: oral liquid, oral suspension extended release, oral tablet
Do not use this medicine if you have taken an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, phenelzine, rasagiline, selegiline, and tranylcypromine.
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 dexchlorpheniramine and pseudoephedrine 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).
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.
More about AllerDur (dexchlorpheniramine / pseudoephedrine)
Related treatment guides
Some side effects may not be reported. You may report them to the FDA.