Medication guide
Chlorpheniramine
- Generic name
- Chlorpheniramine
- Common brand names
- Chlor-Trimeton
- Medication class
- First-generation antihistamine
Overview
Its medication class is First-generation antihistamine. Common uses include Allergic rhinitis, runny nose, and sneezing. Product forms and labels can differ, so follow the specific package instructions and ask a pharmacist or qualified healthcare professional about individual questions.
How to Take it
- Route
- Oral tablet/liquid.
- Time of day
- Best taken in the evening/bedtime; avoid driving after dosing.
- With food/water
- Water with or without light food, esp. if stomach upset.
- Preparation
- Take only one labeled product at a time.
- Safe dose
- Use the lowest dose for age and indication.
- Max dose
- Do not exceed label daily cap.
- Frequency
- Every 4–8 hours when needed unless adverse drowsiness occurs.
- Other recommendations
- Avoid alcohol and other sedatives; do not combine with sleep aids without guidance.
Common uses
- Allergic rhinitis
- runny nose
- sneezing
Common side effects
- Sleepiness
- dry mouth
- constipation
- blurred vision
- dizziness
- headache
- nausea
- and urinary retention
Important warnings
- Avoid use in narrow-angle glaucoma, urinary retention, severe constipation/ileus, and when sedation must be avoided. Do not combine with sedatives, opioids, or other first-generation antihistamines. In children, dose carefully by age and weight; seek care for severe confusion, urinary retention, or breathing difficulty.
General interactions information
Avoid combining with other sedating antihistamines or alcohol.
Sources / references
- Chlorpheniramine — MedlinePlus
U.S. National Library of Medicine
These references offer further reading. A source link does not establish that a clinician has reviewed every statement in this guide.
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