Chlorpheniramine — Uses, Dosage, Side Effects & Safety

Drug class: First-generation antihistamine (alkylamine class)

Overview

Chlorpheniramine is an antihistamine used to relieve symptoms of allergy, hay fever, and the common cold. It helps reduce symptoms such as runny nose, sneezing, itchy or watery eyes, and itching of the throat or nose. It works by blocking the action of histamine, a substance in the body that causes allergic symptoms. Chlorpheniramine is considered a first-generation antihistamine, which means it can cause drowsiness. Key points for patients: Take only as directed, avoid driving or operating machinery if you feel drowsy, and consult your doctor before using if you have certain medical conditions or are taking other medications.

Therapeutic uses

• Allergic rhinitis
• Common cold symptoms

Common side effects

• Drowsiness
• Dry mouth
• Blurred vision
• Constipation
• Dizziness
• Urinary retention
• Confusion

Frequently Asked Questions about Chlorpheniramine

What is chlorpheniramine used for?

Chlorpheniramine is used to relieve symptoms of allergies, hay fever, and the common cold, such as sneezing, runny nose, and itchy eyes.

Does chlorpheniramine make you sleepy?

Yes, drowsiness is a common side effect. Avoid driving or operating machinery until you know how it affects you.

Can I take chlorpheniramine with other allergy medications?

Do not take with other antihistamines or sedating medications unless directed by your doctor, as this can increase side effects.

Is chlorpheniramine safe during pregnancy or breastfeeding?

Consult your doctor before use if you are pregnant or breastfeeding. Safety has not been fully established.

How quickly does chlorpheniramine work?

It usually begins to work within 30 minutes to 1 hour after taking a dose.

What should I do if I overdose on chlorpheniramine?

Seek emergency medical attention immediately. Overdose can cause serious symptoms such as confusion, seizures, or irregular heartbeat.

Can children take chlorpheniramine?

Chlorpheniramine can be used in children, but dosing is age-specific and should be supervised by a healthcare provider. Not recommended for children under 2 years.

Educational information only. Always consult a qualified healthcare professional before starting, stopping, or changing any medication.