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Chlorpheniramine

Chlorpheniramine

Chlorpheniramine belongs to a group of medications known as first-generation antihistamines. For adults and children 6 years of age and older, it is used to treat symptoms caused by Allergies, including itchy and watery eyes, sneezing, runny nose, and skin rash and irritations.

Available form

Tablet

Dosage

8mg

Manufacturers

Merck

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Chlorpheniramine information

Dosage

Side Effects

Available Form

Contraindications

Precautions

Warnings

For Allergic Rhinitis, the usual dose for adults and children 12 years of age and over is 4 mg every 4 to 6 hours. For the extended-release tablets, the usual dose for adults and children 12 years of age and older is 12 mg every 12 hours. The maximum recommended dose is 24 mg within a 24-hour period.

For the prevention of seasonal allergic rhinitis, the recommended starting dose is 4 mg at bedtime, which can be increased to 8 mg 3 times a day as needed over a 2-week period.

For children between 6 and 11 years of age, the usual recommended dose is 2 mg every 4 to 6 hours. The maximum recommended dose is 12 mg within a 24-hour period. Chlorpheniramine is not recommended for children under 6 years of age unless recommended by a doctor.

Seniors may need lower doses of Chlorpheniramine.

Many things can affect the dose of medication that a person needs, such as body weight, other medical conditions, and other medications. If your doctor has recommended a dose different from the ones listed here, do not change the way that you are taking the medication without consulting your doctor.

It is important to take Chlorpheniramine exactly as suggested by your doctor or pharmacist. If you miss a dose, take it as soon as possible and continue with your regular schedule. If it is almost time for your next dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a missed one. If you are not sure what to do after missing a dose, contact your doctor or pharmacist for advice.

Store Chlorpheniramine at room temperature, protect it from light and moisture, and keep it out of the reach of children.

Do not dispose of medications in wastewater (e.g. down the sink or in the toilet) or in household garbage. Ask your pharmacist how to dispose of medications that are no longer needed or have expired.

Before you begin taking a medication, be sure to inform your doctor of any medical conditions or allergies you may have, any medications you are taking, whether you are pregnant or breast-feeding, and any other significant facts about your health. These factors may affect how you should take Chlorpheniramine.

Drowsiness/reduced alertness: Chlorpheniramine may cause drowsiness. Avoid driving or operating machinery until you have determined that you do not become drowsy during the day or experience impaired mental or physical abilities while taking Chlorpheniramine.

Liver function: If you have reduced liver function, discuss with your doctor how Chlorpheniramine may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Chlorpheniramine, and whether any special monitoring is needed.

Medical conditions: If you have any of the following medical conditions, discuss with your doctor how Chlorpheniramine may affect your medical condition, how your medical condition may affect the dosing and effectiveness of Chlorpheniramine, and whether any special monitoring is needed:

angle-closure Glaucoma
chronic lung conditions such as Asthma, chronic Bronchitis, or emphysema
enlarged prostate
heart disease
obstructed bladder
obstruction of the intestines
peptic ulcer disease
seizures

Pregnancy: Chlorpheniramine should not be used during pregnancy unless the benefits outweigh the risks. If you become pregnant while taking Chlorpheniramine, contact your doctor immediately.

Breast-feeding: Chlorpheniramine passes into breast milk, but it does not appear to have serious or harmful effects on breast-feeding infants. Talk to your doctor about whether you should continue breast-feeding.

Children: The safety and effectiveness of using Chlorpheniramine have not been established for children less than 6 years old.

Seniors: Seniors may experience more side effects (e.g., drowsiness, dry mouth, difficulty urinating) with Chlorpheniramine. Chlorpheniramine should be not be used by seniors unless recommended by a doctor, pharmacist, or other health care professional.

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All material © 1996-2025 MediResource Inc. Terms and conditions of use. The contents herein are for informational purposes only. Always seek the advice of your physician or other qualified health providers with any questions you may have regarding a medical condition.

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