Relieving symptoms of sinus congestion, sinus pressure, runny nose, watery eyes, itching of the nose and throat, and sneezing due to upper respiratory infections (eg, colds), allergies, and hay fever. It may also be used for other conditions as determined by your doctor.

Aller-Chlor syrup is an antihistamine. It works by blocking the action of histamine, which helps reduce symptoms such as watery eyes and sneezing.

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  • Aller-Chlor and Chlor-Trimeton
  • Constipation; diarrhea; dizziness; drowsiness; dry mouth, nose, or throat; excitability; headache; loss of appetite; nausea; nervousness or anxiety; trouble sleeping; upset stomach; vomiting; weakness.

    Seek medical attention right away if any of these SEVERE side effects occur while taking chlorpheniramine (the active ingredient contained in Aller-Chlor)
    Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); difficulty urinating or inability to urinate; fast or irregular heartbeat; hallucinations; seizures; severe dizziness, lightheadedness, or headache; tremor; trouble sleeping; vision changes.
  • (oral tablet, chewable, oral liquid, oral tablet, extended release, oral tablet, injectable solution, oral syrup, oral capsule, extended release, oral suspension, extended release, compounding powder)