Chlorpheniramine Maleate Dosage and Usage Guidelines

Parenteral Dosing for Anaphylaxis Management

For adults and children over 12 years, the American Society of Anesthesiologists recommends a dose of 10 mg IM or IV slowly for anaphylaxis management 1, 2, 3
For children 6-12 years, the American Society of Anesthesiologists recommends a dose of 5 mg IM or IV slowly for anaphylaxis management 1, 2, 3
For children 6 months to 6 years, the American Society of Anesthesiologists recommends a dose of 2.5 mg IM or IV slowly for anaphylaxis management 1, 2, 3
For children under 6 months, the American Society of Anesthesiologists recommends a dose of 250 μg/kg IM or IV slowly for anaphylaxis management 1, 2, 3

The British Association of Dermatologists recommends using chlorpheniramine with caution in moderate renal impairment (creatinine clearance 10-20 mL/min) 4
The British Association of Dermatologists recommends avoiding chlorpheniramine in severe renal impairment (creatinine clearance <10 mL/min) 4
The British Association of Dermatologists recommends avoiding chlorpheniramine in severe liver disease due to potential sedating effects 4
The British Association of Dermatologists recommends avoiding chlorpheniramine during pregnancy, especially in the first trimester, although no teratogenic effects have been demonstrated in humans 4

The Journal of Allergy and Clinical Immunology recommends using chlorpheniramine as adjunctive therapy after epinephrine administration in anaphylaxis management 5, 3

The British Association of Dermatologists notes that first-generation antihistamines like chlorpheniramine can cause reduced concentration and performance 4
The British Association of Dermatologists recommends combining chlorpheniramine with non-sedating antihistamines (daytime use of non-sedating, nighttime use of chlorpheniramine) to improve sleep while maintaining daytime alertness 4

The Journal of Allergy and Clinical Immunology recommends that epinephrine remains the first-line treatment for anaphylaxis, with chlorpheniramine serving as adjunctive therapy 5, 3
The British Association of Dermatologists recommends using non-sedating antihistamines for daytime use in urticaria management, with chlorpheniramine potentially added at night 4