Note: This document contains side effect information about chlorcyclizine / pseudoephedrine. Some dosage forms listed on this page may not apply to the brand name NasOpen.
Applies to chlorcyclizine / pseudoephedrine: oral liquid, oral tablet.
Do not use chlorcyclizine and pseudoephedrine if you have used an MAO inhibitor in the past 14 days. A dangerous drug interaction could occur. MAO inhibitors include isocarboxazid, linezolid, methylene blue injection, phenelzine, rasagiline, selegiline, tranylcypromine, and others.
Get emergency medical help if you have any of these signs of an allergic reaction while taking chlorcyclizine / pseudoephedrine: hives; difficult breathing; swelling of your face, lips, tongue, or throat.
Stop using this medicine and call your doctor at once if you have:
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fast or uneven heart rate;
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tremor, seizure (convulsions);
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urinating less than usual or not at all; or
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dangerously high blood pressure (severe headache, blurred vision, buzzing in your ears, anxiety, confusion, chest pain, uneven heartbeats, seizure).
Common side effects may include:
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dizziness, drowsiness;
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constipation;
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blurred vision; or
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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.
