Skip to Content

Dallergy Syrup Side Effects

Generic name: chlorcyclizine / phenylephrine

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

Applies to chlorcyclizine / phenylephrine: oral liquid, oral tablet, oral tablet chewable

Warning

Do not use chlorcyclizine and phenylephrine 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 / phenylephrine: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

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

  • fast or uneven heart rate;

  • tremor, seizure (convulsions);

  • urinating less than usual or not at all; or

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

Common side effects may include:

  • dizziness, drowsiness;

  • 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.

More about Dallergy Syrup (chlorcyclizine / phenylephrine)

Other Formulations

Related treatment guides

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

Some side effects may not be reported. You may report them to the FDA.