SULGEN® Spray Betula verrucosa high dose clinical trials

Phase II-III study to assess the efficacy and safety of sublingual immunotherapy in patients suffering from birch pollen allergy

This study looks at a spray treatment for birch pollen allergy. It wants to see if this spray, used under the tongue, can reduce symptoms like sneezing and itchy eyes, and if it's safe to use, compared to a dummy spray.