The U.S. Food and Drug Administration has approved Merck & Co's pollen allergy drug Ragwitek.
The tablet, which is administered by placing it under the tongue, is to treat the short ragweed pollen induced allergic rhinitis.
The approval for Ragwitek comes days after U.S. regulatory approval for Merck's grass pollen allergy drug Grastek.
Merck's Ragwitek will compete with Stallergenes SA's immunotherapy treatment for five types of grass pollen, which was approved by the FDA earlier this month.
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