POLLINEX Trees Initial/Extension Course is a type of immunotherapy specifically designed for individuals who suffer from tree pollen allergies. This treatment involves administering small doses of tree pollen allergens to the patient over a period of time, with the aim of gradually desensitizing the immune system to these allergens. The course typically starts with an initial phase, where the patient receives a series of injections or sublingual drops containing the allergens, followed by an extension phase that aims to reinforce and extend the desensitization process. This approach can significantly reduce the severity of allergic reactions to tree pollens, improving the quality of life for individuals with tree pollen allergies. It is important for patients to consult with a healthcare professional to determine if this treatment is suitable for their specific allergy profile and to discuss potential risks and benefits.