FDA Information
Chlorpheniramine was originally approved by the FDA as a prescription-only drug in 1950 and was later moved to OTC status.
Immediate and sustained-release dosage forms are now currently available, as well as a once daily formulation that was approved in November 1994.
Please visit the official site of the FDA for further information.
Why is this medication prescribed?
Dosage and using this medicine
What special precautions should I follow?
What should I do if I forget a dose?
What side effects can this medication cause?