About chlorpheniramine maleate
First-generation antihistamine
Used for
- Relieves sneezing, runny nose, itchy eyes, and other allergy symptoms
- Relieves symptoms of common colds
Usual adult dose
Usually 4 mg every 4–6 hours; maximum 24 mg daily.
Usual dose in children
Ages 6–11: usually 2 mg every 4–6 hours; maximum 12 mg daily. Not for children under 6 unless directed by a clinician.
Common side effects
- Sleepiness
- Dry mouth, nose, or throat
- Blurred vision
- Constipation or difficulty urinating
Important warnings
- Can impair alertness; avoid driving if drowsy.
- Avoid alcohol and other sedating medicines.
- Use cautiously with glaucoma, enlarged prostate, or breathing problems.
- Do not combine with monoamine oxidase inhibitors or use within 14 days of stopping them.
Pregnancy
Safety information is limited; use during pregnancy only when recommended by a healthcare professional.
Breastfeeding
May cause infant drowsiness or reduce milk supply; seek professional guidance before use.
Interactions
- Alcohol, opioids, sleeping medicines, and other sedatives can increase drowsiness.
- Other anticholinergic medicines can worsen dry mouth, blurred vision, constipation, or urinary difficulty.
- Monoamine oxidase inhibitors can cause serious interactions.
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 It may be incomplete or out of date.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.