What medications can be prescribed for seasonal pollen allergy?

Treatment for Pollen Allergies

For initial treatment of seasonal pollen allergies, prescribe an intranasal corticosteroid as monotherapy—this is the most effective first-line option with strong evidence supporting superior symptom control. 1

First-Line Treatment Algorithm

Standard Initial Therapy (Ages 12+)

• Intranasal corticosteroids alone (e.g., fluticasone propionate, mometasone) are the gold standard for initial treatment 1
• Do NOT routinely add oral antihistamines to intranasal corticosteroids for initial therapy—combination provides no additional benefit 1
• Intranasal corticosteroids are significantly more effective than oral leukotriene receptor antagonists (montelukast) for symptom reduction 1

When Patients Cannot Tolerate Intranasal Steroids

• Oral leukotriene receptor antagonists (montelukast) can be prescribed as an alternative, though they are less effective 1
• This may be appropriate for patients who refuse nasal sprays or have concurrent mild persistent asthma 1

Step-Up Therapy for Moderate-to-Severe Disease

Combination Therapy Option

• For patients with moderate-to-severe symptoms inadequately controlled on intranasal corticosteroids alone, consider adding an intranasal antihistamine (azelastine) 1
• The combination of fluticasone propionate plus azelastine provides clinically meaningful additional symptom reduction compared to either agent alone 1
• Symptom score reductions: combination therapy (-5.31 to -5.7) > fluticasone alone (-3.84 to -5.1) > azelastine alone (-3.25 to -4.54) > placebo (-2.2 to -3.03) 1

Important Caveats for Combination Therapy

• This is a weak recommendation due to increased cost, potential for adverse effects (dysgeusia 2-14%, minimal somnolence 0.4-1.1%), and limited quality-of-life improvement beyond symptom scores 1
• Patients using combination therapy require comedication less frequently (30-35% of days) compared to those on intranasal corticosteroids alone (45-60% of days) 1

What NOT to Prescribe Initially

• Avoid oral antihistamines added to intranasal corticosteroids for initial treatment—no demonstrated benefit 1
• Among oral antihistamines, cetirizine shows superior efficacy to loratadine (36.7% vs 15.4% symptom reduction), with faster onset of action (1 hour vs 3 hours) 2

Additional Treatment Considerations

Allergen Immunotherapy

• Subcutaneous immunotherapy (SCIT) is more effective than sublingual immunotherapy (SLIT) for grass pollen allergies, with greater symptom score reduction (SMD -0.92 vs -0.25 to -0.40) 3
• SLIT tablets show only small benefit (SMD -0.28 for symptoms, -0.24 for medication use) and should not replace pharmacotherapy as first-line treatment 4
• Immunotherapy is the only disease-modifying treatment option for long-term management 1

Real-World Treatment Patterns

• Patients typically self-medicate on-demand rather than following prescribed continuous regimens 1
• Adherence to guideline-recommended continuous therapy is poor in clinical practice 1
• Untreated days paradoxically show better control, suggesting patients appropriately reduce medication when symptoms are mild 1