Desensitization for pneumallergens is used in daily practice for the treatment of allergic rhinitis and allergic asthma. However, specific immunotherapy has long been debated in the medical literature as a treatment for allergic asthma until the latest international recommendations for the management of asthma (GINA) reveal specific immunotherapy as a treatment in sensitized patients, poorly controlled by inhaled corticosteroids (FEV 1 > 70%). In this article you will find a current overview of the medical literature on the usefulness of specific desensitization to reduce asthma symptoms and symptomatic treatments, prevent the onset of asthma in patients with allergic rhinitis as well as prevent new sensitizations.