The FDA has approved Ragwitek to treat hay fever, with and without 
conjunctivitis, caused by short ragweed pollen. The pill, to be taken 
sublingually, contains an extract of short ragweed pollen.

Adults should take Ragwitek daily for 12 weeks before ragweed pollen 
season begins and should continue to do so during the season. It will 
contain a boxed warning alerting patients of the potential for severe 
allergic reactions.

FDA news release