Vitamin D as adjuvant to subcutaneous specific immunotherapy in patients with allergic rhinitis Specific allergen immunotherapy is the treatment of choice for patients with persistent allergic rhinitis. Some strategies to accelerate immunological and clinical changes to ensure an early response and improve adherence are needed. The administration of vitamin D along with conventional treatments in allergic patients with asthma or atopic dermatitis, pathophysiological entities like allergic rhinitis, reduces the severity of symptoms in less time.