Chlorphenamine

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# Overview
Chlorphenamine is an anti-allergic agent that is FDA approved for the treatment of allergic rhinitis and common cold.   Common adverse reactions include diarrhea, nausea, vomiting, and somnolence.

# Adult Indications and Dosage

## FDA-Labeled Indications and Dosage (Adult)
- Dosing Information
- The dosage of chlorpheniramine depends on the product. Use the following guidelines: 4-hour allergy tablet - 1 tablet (4 mg) every 4 to 6 hours up to a maximum of 6 tablets in 24 hours; 8-hour allergy tablet - 1 tablet (8 mg) every 8 to 12 hours up to 3 tablets in 24 hours; 12-hour tablet - 1 tablet (12 mg) every 12 hours up to 2 tablets in 24 hours.
- For the prevention of allergic rhinitis symptoms, administer chlorpheniramine 4 mg (syrup or plain, uncoated tablet) and increase 3 times daily every 3 days as tolerated until reaching 8 mg 3 times daily. Start before the allergy season (for ragweed - August 1st) and continue until inhalant allergen is gone (first frost in ragweed areas). Most patients develop tolerance to the sedative effect if dose is started low and increased in small increments (only when previous lower dose is tolerated).
- Dosing Information
- For cough, 2 teaspoonfuls of Codeprex(TM) (10 mL; equivalent to codeine 40 mg and chlorpheniramine maleate 8 mg) ORALLY every 12 hours; maximum dose 4 teaspoonfuls in 24 hours.

## Off-Label Use and Dosage (Adult)

### Guideline-Supported Use
There is limited information regarding Off-Label Guideline-Supported Use of Chlorphenamine in adult patients.

### NonGuideline-Supported Use
There is limited information regarding Off-Label NonGuideline-Supported Use of Chlorphenamine in adult patients.

# Pediatric Indications and Dosage

## FDA-Labeled Indications and Dosage (Pediatric)
- Dosing Information
- Reports of infant deaths have been associated with over-the-counter (OTC) cough and cold medications, and chlorpheniramine is commonly used as an antihistamine, alone or in combination with a cough suppressant, a decongestant, and/or an expectorant in the OTC cough and cold products. In January 2008, the US Food and Drug Administration issued a public health advisory recommending that cough and cold products not be used in children younger than 2 years due to the risk of serious and life-threatening effects.
- Dosing Information
- Reports of infant deaths have been associated with over-the-counter (OTC) cough and cold medications, and chlorpheniramine is commonly used as an antihistamine, alone or in combination with a cough suppressant, a decongestant, and/or an expectorant in the OTC cough and cold products. In January 2008, the US Food and Drug Administration issued a public health advisory recommending that cough and cold products not be used in children younger than 2 years due to the risk of serious and life-threatening effects.
- Important Note:
- Chlorpheniramine may cause excitability in children. It is not recommended to give the 8-hour or 12-hour allergy tablets to children younger than 12 years and the 4-hour allergy tablets to children younger than 6 years. Codeprex(TM) is not recommended for children younger than 6 years.
- The dose for children ages 6 to 11 years, using the 4-hour allergy tablet, is half of the recommended adult dose. Therefore, 2 mg (break the 4 mg tablet in half) every 4 to 6 hours up to 12 mg in 24 hours. The 8-hour and 12-hour allergy tablets are not recommended.
- Oral:
- To treat children with allergic rhinitis, start with 2 mg and increase progressively to 12 mg/day.
- For cough, allergic rhinitis, and hay fever in children 12 years or older: 2 teaspoonfuls of Codeprex(TM) (10 mL; equivalent to codeine 40 mg and chlorpheniramine maleate 8 mg) ORALLY every 12 hours; maximum dose 4 teaspoonfuls in 24 hours.
- For cough, allergic rhinitis, and hay fever in children 6 to 12 years of age: 1 teaspoonful of Codeprex(TM) (5 mL; equivalent to codeine 20 mg and chlorpheniramine maleate 4 mg) ORALLY every 12 hours; maximum dose 2 teaspoonfuls in 24 hours.
- Maximum Dose:
- The maximum recommended dose for oral chlorpheniramine in children 6 to 11 years old is 12 mg/day.

## Off-Label Use and Dosage (Pediatric)

### Guideline-Supported Use
There is limited information regarding Off-Label Guideline-Supported Use of Chlorphenamine in pediatric patients.

### NonGuideline-Supported Use
There is limited information regarding Off-Label NonGuideline-Supported Use of Chlorphenamine in pediatric patients.

# Contraindications
Hypersensitivity to chlorpheniramine or dexchlorpheniramine

# Warnings
- Ask a doctor before use if you have a breathing problem such as emphysema or chronic bronchitis, glaucoma or trouble urinating due to an enlarged prostate gland
- Ask a doctor or pharmacist before use if you
- are taking sedatives or tranquilizers
- When using this product
- marked drowsiness may occur avoid alcoholic beverages alcohol, sedatives, and tranquilizers may increase drowsiness be careful when drivinga motor vehicle or operating machinery
- excitability may occur especially in children
- If pregnant or breast-feeding
- ask a health professional before use

# Adverse Reactions

## Clinical Trials Experience
There is limited information regarding Chlorphenamine Clinical Trials Experience in the drug label.

## Postmarketing Experience
There is limited information regarding Chlorphenamine Postmarketing Experience in the drug label.

# Drug Interactions
- Almotriptan
- Amitriptyline
- Amoxapine
- Belladonna
- Belladonna Alkaloids
- Bupropion
- Desvenlafaxine
- Dolasetron
- Donepezil
- Fentanyl
- Fluoxetine
- Fosphenytoin
- Granisetron
- Hydroxytryptophan
- Levomilnacipran
- Lorcaserin
- Mepenzolate
- Meperidine
- Metoprolol
- Mirtazapine
- Morphine
- Morphine Sulfate Liposome
- Oxymorphone
- Palonosetron
- Phenytoin
- Procarbazine
- Tramadol
- Trazodone
- Umeclidinium
- Vilazodone
- Vortioxetine
- Ziprasidone

# Use in Specific Populations

### Pregnancy
Pregnancy Category (FDA):
- Pregnancy Category
Pregnancy Category (AUS):
- Australian Drug Evaluation Committee (ADEC) Pregnancy Category
There is no Australian Drug Evaluation Committee (ADEC) guidance on usage of Chlorphenamine in women who are pregnant.

### Labor and Delivery
There is no FDA guidance on use of Chlorphenamine during labor and delivery.

### Nursing Mothers
There is no FDA guidance on the use of Chlorphenamine with respect to nursing mothers.

### Pediatric Use
There is no FDA guidance on the use of Chlorphenamine with respect to pediatric patients.

### Geriatic Use
There is no FDA guidance on the use of Chlorphenamine with respect to geriatric patients.

### Gender
There is no FDA guidance on the use of Chlorphenamine with respect to specific gender populations.

### Race
There is no FDA guidance on the use of Chlorphenamine with respect to specific racial populations.

### Renal Impairment
There is no FDA guidance on the use of Chlorphenamine in patients with renal impairment.

### Hepatic Impairment
There is no FDA guidance on the use of Chlorphenamine in patients with hepatic impairment.

### Females of Reproductive Potential and Males
There is no FDA guidance on the use of Chlorphenamine in women of reproductive potentials and males.

### Immunocompromised Patients
There is no FDA guidance one the use of Chlorphenamine in patients who are immunocompromised.

# Administration and Monitoring

### Administration
There is limited information regarding Chlorphenamine Administration in the drug label.

### Monitoring
There is limited information regarding Chlorphenamine Monitoring in the drug label.

# IV Compatibility
There is limited information regarding IV Compatibility of Chlorphenamine in the drug label.

# Overdosage
There is limited information regarding Chlorphenamine overdosage.  If you suspect drug poisoning or overdose, please contact the National Poison Help hotline (1-800-222-1222) immediately.

# Pharmacology

## Mechanism of Action

## Structure

## Pharmacodynamics
There is limited information regarding Pharmacodynamics of Chlorphenamine in the drug label.

## Pharmacokinetics
There is limited information regarding Pharmacokinetics of Chlorphenamine in the drug label.

## Nonclinical Toxicology
There is limited information regarding Nonclinical Toxicology of Chlorphenamine in the drug label.

# Clinical Studies
There is limited information regarding Chlorphenamine Clinical Studies in the drug label.

# How Supplied

## Storage
There is limited information regarding Chlorphenamine Storage in the drug label.

# Images

## Drug Images

## Package and Label Display Panel

# Patient Counseling Information
- Take every 4 to 6 hours do not take more than 6 doses in 24 hours Adults and children 12 years
and over: 1 tablet Children 6 to under 12 years: 1/2 tablet Children under 6 years: consult a doctor.

# Precautions with Alcohol
- Alcohol-Chlorphenamine interaction has not been established. Talk to your doctor about the effects of taking alcohol with this medication.

# Brand Names
Aller-Chlor,
C.P.M.,
Chlor-Phen,
Chlor-Trimeton Allergy,
Chlorphen,
Diabetic Tussin Allergy Relief,
Efidac 24 Chlorpheniramine,
Teldrin HBP.

# Look-Alike Drug Names
- A  B

# Drug Shortage Status

# Price