How quickly does Chlorpheniramine take effect after ingestion, and how long does its symptom relief typically last in most patients?
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How quickly does Chlorpheniramine take effect after ingestion, and how long does its symptom relief typically last in most patients?
Chlorpheniramine typically begins to work within 30 to 60 minutes of ingestion. Its effects generally last for 4 to 6 hours in most patients.