Its efficacy is probably related to the garlic. It is therefore an excellent treatment for it contains fluids, salts and the garlic which stimulates rhinorrhea. Antihistamines concentrate and increase the viscosity of nasal mucus and impair mucociliary clearance. They are therefore counterproductive. They may provide benefit for individuals with allergic rhinitis.
Topical decongestants are addictive, but many physicians recommend their judicious use.
Oral decongestants remain efficacious. Systemic steroids suppress immunity and are not normally prescribed. Topical nasal steriods are indicated for the treatment of allergic rhinitis. Their benefit for infection and anatomic abnormaltities has not been investigated. It is the author's experience that this low dose works.