What is the recommended treatment for allergic rhinitis?

Treatment of Allergic Rhinitis

Intranasal corticosteroids should be prescribed as first-line monotherapy for all patients ≥12 years with allergic rhinitis whose symptoms affect quality of life. 1, 2

First-Line Treatment Algorithm

For All Patients with Quality-of-Life Impairment

• Start with intranasal corticosteroid (INCS) monotherapy (fluticasone, mometasone, budesonide, or triamcinolone) as the single most effective medication class for controlling all four cardinal symptoms: nasal congestion, rhinorrhea, sneezing, and itching 1, 2, 3
• INCS are superior to all other single agents including oral antihistamines and leukotriene receptor antagonists 1, 2
• Continuous daily use is more effective than intermittent use due to ongoing allergen exposure 2

What NOT to Do

• Do not routinely add oral antihistamines to INCS monotherapy—this combination provides no additional benefit over INCS alone and is not cost-effective 1, 2
• Do not use oral leukotriene receptor antagonists (montelukast) as primary therapy—INCS are significantly more effective; LTRAs should only be considered if patients refuse intranasal therapy or have concurrent mild persistent asthma 1, 2
• Do not use depot parenteral corticosteroids due to potential systemic risks 4

Alternative First-Line Options for Mild Disease

When INCS Are Not Preferred

• Second-generation oral antihistamines (cetirizine, fexofenadine, desloratadine, loratadine) are effective for sneezing, itching, and rhinorrhea but have limited impact on nasal congestion 1, 2, 3
• Intranasal antihistamines (azelastine, olopatadine) are equally effective alternatives for mild symptoms 1, 2, 3
• Never use first-generation antihistamines—they cause significant sedation, anticholinergic effects (dry mouth, urinary retention), and performance impairment 2

Step-Up Treatment for Inadequate Response

When INCS Monotherapy Fails

Add intranasal antihistamine to INCS rather than oral antihistamine—this is the most effective combination therapy 2, 4

For Moderate-to-Severe Seasonal Allergic Rhinitis (≥12 years)

• Fixed-dose combination spray (azelastine + fluticasone) achieves ~40% greater symptom reduction compared to either agent alone 1, 2
• Symptom score reductions: placebo (-2.2 to -3.0), azelastine alone (-3.3 to -4.5), fluticasone alone (-3.8 to -5.1), combination (-5.3 to -5.7) 1
• Common adverse effects: dysgeusia (2-13%), somnolence (0.4-1.1%) 1, 2
• This is a weak recommendation due to higher cost and potential side effects that may lead patients to decline therapy 1, 2

Real-World Effectiveness Data

• Patients using INCS + intranasal antihistamine required additional medication on only 30-35% of days versus 45-60% of days for INCS alone 2

Adjunctive Therapies

Oral Decongestants

• Pseudoephedrine or phenylephrine reduce nasal congestion and enhance antihistamine effects 2
• Monitor blood pressure in hypertensive patients due to variable hemodynamic responses 2

Intranasal Decongestants

• Limit use to ≤3 days maximum to prevent rhinitis medicamentosa (rebound congestion) 2, 4
• Only indicated for short-term relief during acute exacerbations, viral infections, or eustachian tube dysfunction 2
• In limited circumstances with concurrent INCS use, may extend to 4 weeks 4

Disease-Modifying Treatment

Allergen Immunotherapy

• Offer or refer for subcutaneous or sublingual immunotherapy when pharmacotherapy (with or without environmental controls) provides inadequate response 1, 2, 5
• This is the only disease-modifying treatment that alters natural history, improves long-term control, reduces medication needs, and potentially prevents new sensitizations 2, 5

Essential Clinical Practices

Diagnosis

• Clinical diagnosis based on history and physical examination is sufficient when patients present with nasal congestion, runny nose, itchy nose, or sneezing plus allergic-consistent findings (clear rhinorrhea, pale nasal mucosa, red watery eyes) 1, 2
• Perform specific IgE testing (skin or blood) only when empiric treatment fails, diagnosis is uncertain, or specific allergen identification is needed to target therapy 1, 2
• Do not routinely perform sinonasal imaging in patients with symptoms consistent with allergic rhinitis 1, 2

Comorbidity Assessment

• Systematically assess and document asthma, atopic dermatitis, sleep-disordered breathing, conjunctivitis, rhinosinusitis, and otitis media in all patients 1, 2
• Treatment of rhinitis provides benefits for concurrent asthma 6

Patient Education

• Instruct patients to aim intranasal sprays away from the nasal septum to reduce local irritation and epistaxis 2
• Advise allergen avoidance when specific triggers are identified, though this is usually inadequate for outdoor allergens causing seasonal symptoms 1
• Environmental controls (air filtration, bed covers, pet removal, acaricides) may be advised when allergens correlate with clinical symptoms 1

Common Pitfalls to Avoid

• Pale nasal turbinates do not definitively confirm allergic rhinitis—nonallergic rhinitis can present identically 2
• Avoid oral decongestants during first trimester of pregnancy 4
• Do not recommend acupuncture or herbal therapy—inadequate evidence supports their use 1, 4