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Ala-Hist IR Side Effects

Generic name: dexbrompheniramine

Medically reviewed by Last updated on Jun 16, 2022.

Note: This document contains side effect information about dexbrompheniramine. Some of the dosage forms listed on this page may not apply to the brand name Ala-Hist IR.

Applies to dexbrompheniramine: oral liquid, oral tablet


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

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

Stop using dexbrompheniramine (the active ingredient contained in Ala-Hist IR) and call your doctor at once if you have:

  • fast or uneven heart rate;

  • mood changes;

  • tremor, seizure (convulsions);

  • easy bruising or bleeding, unusual weakness;

  • feeling short of breath; or

  • little or no urination.

Common side effects may include:

  • drowsiness;

  • dry mouth, nose, or throat;

  • constipation;

  • blurred vision; 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 Ala-Hist IR (dexbrompheniramine)

Patient resources

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.