About chlorpheniramine maleate
First-generation antihistamine
Used for
- Relieves sneezing, runny nose, itchy eyes, and other allergy symptoms
- Helps relieve itching from hives and insect bites
Usual adult dose
Usually 4 mg every 4–6 hours; maximum 24 mg daily.
Usual dose in children
Ages 2–5: 1 mg every 4–6 hours; ages 6–11: 2 mg every 4–6 hours. Maximum 6 mg and 12 mg daily, respectively.
Common side effects
- Drowsiness
- Dry mouth, nose, or throat
- Blurred vision
- Constipation or difficulty urinating
Important warnings
- May cause drowsiness; avoid driving if affected.
- Avoid alcohol and other medicines that cause sleepiness.
- Use cautiously with glaucoma, breathing problems, or difficulty urinating.
- Not for children under 2 unless specifically directed by a clinician.
Pregnancy
Use only when needed and after discussing with a healthcare professional; pregnancy safety information is limited.
Breastfeeding
May cause infant drowsiness or irritability and may reduce milk supply, especially with repeated use.
Interactions
- Alcohol, opioids, sedatives, and sleep medicines can increase drowsiness.
- Other antihistamines or anticholinergic medicines can increase side effects.
- Monoamine oxidase inhibitors may cause serious interactions; avoid use during treatment and for 14 days afterward.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.