Chlorpheniramine Dosage and Precautions

Patient Considerations

The British Journal of Dermatology recommends using chlorpheniramine with caution in patients with glaucoma of angle closure, hypertrophy of the prostate, urinary retention, and severe hepatic disease (which may require dose adjustment) 1
The British Journal of Dermatology advises avoiding or using chlorpheniramine with extreme caution during pregnancy, especially during the first trimester, and lactation 1
For patients with moderate renal insufficiency (creatinine clearance 10-20 ml/min), a dose reduction should be considered 1
In elderly patients, it is recommended to start with lower doses due to increased sensitivity to anticholinergic effects 1, 2

The Praxis Medical Insights guidelines recommend avoiding concomitant use of chlorpheniramine with monoamine oxidase inhibitors (MAOIs) and medications with anticholinergic effects 2