Chlorpheniramine maleate is one of the oldest and most widely used antihistamines. It blocks histamine, the chemical released during an allergic reaction, and it causes drowsiness, which is why it appears in so many night time cold remedies.

What Chlorpheniramine Maleate Is Used For

Sneezing, runny nose and itchy watery eyes
Hay fever and dust allergy
Hives, itchy rashes and insect bites
Symptom relief in combination cold and flu preparations

Common Side Effects

Drowsiness
Dry mouth and throat
Blurred vision
Difficulty passing urine in older men

Precautions

Avoid driving and alcohol until you know how it affects you. It is not suitable for young children unless a doctor advises it, and older adults are more prone to confusion and falls with it. Check the labels of other cold products you take, since many already contain an antihistamine.

This page is general information only. It is not a substitute for advice from your doctor or pharmacist, and it does not include dosage. Always follow the directions given to you and read the leaflet inside the pack.