LYCOS RETRIEVER 
Rhinitis: Substances
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Cromolyn sodium — Cromolyn sodium (Nasalcrom®) prevents the symptoms of allergic rhinitis by stabilizing mast cells (the cells that can release substances which cause inflammation). This drug is available as an over-the-counter nasal spray that must be used three to four times per day, preferably before symptoms have begun, to effectively prevent the symptoms of allergic rhinitis. Cromolyn sodium has not been associated with any serious side effects.
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As is the case with allergic rhinitis, vasomotor rhinitis often can't be cured. Fortunately, symptoms can be kept under control by limiting exposure to substances that cause symptoms and by taking medication when needed. Patients with vasomotor rhinitis should not smoke or permit smoking in their homes.
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Allergic rhinitis is an extremely common type of allergy that can affect anyone, and develop at any age. Allergies are not inherited, but it has been found that if a family member has a sensitivity to a certain substance, other family members are more likely to have the same or similar sensitivity.
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