Treatment of Non-Allergic Rhinitis

Primary Treatment Options

• The American Academy of Allergy, Asthma, and Immunology recommends intranasal corticosteroids as the first-line treatment for non-allergic rhinitis, effectively relieving both congestion and rhinorrhea associated with vasomotor rhinitis 1, 2
• Intranasal antihistamines, such as azelastine, are effective for non-allergic rhinitis, particularly for vasomotor rhinitis, with dosing of two sprays per nostril twice daily for patients 12 years and older 1, 3
• Intranasal anticholinergics, such as ipratropium bromide, are particularly effective for treating rhinorrhea in non-allergic rhinitis and can be used in combination with other medications for increased efficacy 1, 4
• Oral decongestants help reduce nasal congestion but should be used with caution in patients with hypertension, arrhythmias, insomnia, prostate hypertrophy, or glaucoma 5

Treatment Algorithm Based on Predominant Symptoms

• For patients with predominant congestion, the American College of Allergy, Asthma, and Immunology suggests starting with intranasal corticosteroids 1, 2
• For patients with predominant rhinorrhea, intranasal anticholinergics, such as ipratropium bromide, are the most effective option and can be combined with intranasal corticosteroids for better efficacy without increased adverse effects 1, 4
• For patients with mixed symptoms, a combination of intranasal corticosteroids and intranasal antihistamines provides greater relief than either alone 1, 2

Specific Non-Allergic Rhinitis Subtypes

• For patients with vasomotor rhinitis, intranasal corticosteroids and intranasal antihistamines are effective, and avoiding triggering irritants is recommended 2
• For patients with gustatory rhinitis, intranasal anticholinergics before meals are particularly effective 2
• For patients with rhinitis medicamentosa, discontinuing nasal decongestant sprays and instituting intranasal corticosteroids is recommended 2
• For patients with non-allergic rhinitis with eosinophilia, intranasal corticosteroids are the treatment of choice 2

Important Considerations and Pitfalls

• The American Academy of Otolaryngology recommends that nonsedating oral antihistamines should be avoided in non-allergic rhinitis as they have not been shown to be effective 3
• Topical decongestants should only be used short-term (less than 3 days) to prevent rhinitis medicamentosa 5
• Nasal saline irrigation can be beneficial as an adjunct therapy for symptoms of chronic rhinorrhea 1
• When using intranasal corticosteroids, patients should be instructed to direct sprays away from the nasal septum to minimize local side effects, and periodic examination of the nasal septum is recommended to ensure there are no mucosal erosions when using intranasal corticosteroids long-term 3

When to Consider Referral

• The American College of Allergy, Asthma, and Immunology recommends referral for prolonged manifestations of rhinitis not responding to standard therapy 1
• Referral is also recommended when complications such as nasal polyps develop 1, 6
• If systemic corticosteroids have been required, which should generally be avoided except for short courses (5-7 days) in very severe cases, referral is recommended 1, 3

Management of Non‑Allergic Rhinorrhea

First‑Line Pharmacologic Therapy

Combination Therapy

Alternative First‑Line Options

Treatment Algorithm for Symptom Patterns

Adjunctive and Supportive Measures

Special Subtype: Non‑Allergic Rhinitis with Eosinophilia (NARES)

Corticosteroid Considerations

Evidence strength for the above statements is not explicitly graded in the source material.

Pharmacologic Management of Non‑Allergic (Vasomotor) Rhinitis

First‑Line Therapies

• Intranasal corticosteroids are the most effective monotherapy for vasomotor rhinitis, improving both nasal congestion and inflammation. 9
• Intranasal corticosteroids are also effective for other non‑allergic rhinitis phenotypes, including vasomotor rhinitis and non‑allergic rhinitis with eosinophilia (NARES). 10
• Intranasal ipratropium bromide (0.03 % spray, 42 µg per nostril 2–3 times daily) is the treatment of choice for rhinorrhea‑predominant disease, acting as a cholinergic antagonist to block glandular hypersecretion. 9
• Ipratropium bromide markedly reduces gustatory‑induced rhinorrhea when administered before meals. 9
• Ipratropium bromide decreases rhinorrhea but does not affect nasal congestion or sneezing. 9

Combination Therapy for Mixed Symptoms

• Adding an intranasal antihistamine (azelastine) to an intranasal corticosteroid provides greater overall symptom relief than either agent alone. 9
• Combining ipratropium bromide with an intranasal corticosteroid yields superior control of rhinorrhea compared with either drug alone, without increasing adverse effects. 9

Intranasal Antihistamines

• Azelastine nasal spray (137 µg per nostril twice daily for patients ≥12 years) is FDA‑approved for non‑allergic rhinitis and effectively reduces vasomotor symptoms. 9
• Intranasal antihistamines have a rapid onset of action, making them suitable for as‑needed use. 10
• Compared with oral antihistamines, intranasal antihistamines produce a clinically significant reduction in nasal congestion, although they are less effective than intranasal corticosteroids overall. 10
• The most common side effects of intranasal antihistamines are a bitter taste and somnolence, occurring in roughly one‑tenth of users. 10

Oral Decongestants

• Pseudoephedrine reduces nasal congestion but should be prescribed cautiously in individuals with hypertension, cardiac arrhythmias, insomnia, prostatic enlargement, or glaucoma. 9
• Reported adverse effects of pseudoephedrine include insomnia, irritability, palpitations, and elevated blood pressure. 10

Therapies to Avoid or Use with Caution

• Oral antihistamines are generally ineffective for non‑allergic rhinitis and should be avoided. 9
• Topical nasal decongestants must be limited to ≤ 3 days to prevent rebound congestion (rhinitis medicamentosa). 10
• Repeated or chronic systemic corticosteroids are discouraged; short courses (5–7 days) are reserved for very severe, refractory cases only. 9