家中你不知道的7種過敏原: 灰塵、蟎蟲、寵物皮屑、花粉、蟑螂、黴菌和內毒素（來自細菌，混雜在灰塵中）。過敏症的藥物治療: 抗組胺+緩解充血、色甘酸鈉、激素噴鼻劑、滴眼藥、 + 新型的花粉提取物經舌下給藥。
April 17, 2014 - FDA approves Ragwitek for short ragweed pollen allergies
2014年4月17日，FDA批準了默沙東（Merck, Sharp & Dohme Corp.）研發的Ragwitek用於治療短豚草過敏症（花粉熱）。該藥物是一種短豚草花粉的提取物，在花粉季節到來的12周前開始治療。Ragwitek經舌下給藥，首次治療需在醫護人員監視下進行。臨床研究證實Ragwitek可減輕花粉熱患者在花粉季節的症狀。
Ragwitek contains an extract from short ragweed (Ambrosia artemisiifolia) pollen. It is a tablet that is taken once daily by placing it sublingually, where it rapidly dissolves. Treatment with Ragwitek is started 12 weeks before the start of ragweed pollen season and continued throughout the season. The first dose is taken in a health care professional’s office where the patient is to be observed for at least 30 minutes for potential adverse reactions. After the first dose, patients can take Ragwitek at home.
