Azelastine is an antihistamine medication used to relieve the nasal symptoms of allergic rhinitis. It belongs to the allergy-relief category and works by blocking the action of histamine, a chemical released during an allergic response. The drug is supplied as a sprayer containing 10 ml of solution, and in Hong Kong it is classified as a prescription-only medicine under the oversight of the Department of Health.
Azelastine is an H1-receptor inverse agonist. By binding to H1 receptors on cells in the nasal mucosa, it prevents histamine from triggering the typical allergic reactions such as itching, sneezing, and watery discharge. In addition, azelastine stabilises mast cells, reducing the release of other inflammatory mediators. The spray delivers the drug directly to the nasal lining, providing rapid onset of relief-usually within minutes-and lasting for several hours. Because the medication is applied locally, only a small fraction reaches the systemic circulation, limiting overall exposure.
These indications are approved by Hong Kong health authorities for relief of nasal congestion, runny nose, sneezing, and itching. The spray is intended for adult and adolescent patients; younger children should be evaluated separately by a healthcare professional.
Who should use Azelastine
Absolute contraindications
Relative contraindications
Special populations such as the elderly may experience a higher incidence of drowsiness and should be monitored for sedation.
If patients are taking multiple medications, they should inform their pharmacist or physician before starting azelastine.
Routine laboratory monitoring is not required for most users. Patients should schedule a follow-up visit if:
This article provides educational information about azelastine and is not a substitute for professional medical advice. Treatment decisions, including use for unapproved indications, must be made under the guidance of a qualified healthcare provider. The content is intended for informational purposes and does not constitute medical recommendations. Always consult a physician before starting, stopping, or changing any medication regimen.
Yes, the spray can be used during air travel to help control nasal congestion caused by allergen exposure or cabin dryness. Use it as directed, and avoid spraying directly into the eyes.
A mild burning sensation is a common initial reaction. If discomfort persists after a few applications, inform your healthcare provider, who may adjust the dosing frequency or suggest an alternative therapy.
With the typical dosing of two sprays per nostril daily, a 10 ml bottle generally lasts about 30 days. Individual usage may vary slightly depending on spray technique.
No. Nasal sprays are intended for single-person use to prevent cross-contamination and ensure the correct dose for each individual.
There are no direct pharmacokinetic interactions reported between azelastine and blood-pressure drugs. However, if you are taking multiple nasal or oral antihistamines, discuss possible additive drowsiness with your clinician.
Wipe the tip with a clean dry tissue after each use; avoid submerging the device in water. If the tip becomes clogged, run the spray a few times into a tissue to clear it.
Alcohol can increase drowsiness caused by azelastine. Moderate consumption is generally acceptable, but avoid excessive alcohol until you know how the medication affects you.
The spray is approved for allergic rhinitis. Its effectiveness for non-allergic sinusitis is not established; consult a physician for alternative treatments.
Many patients experience improvement within 15-30 minutes after the first dose, with full effect developing after several days of regular use.
Yes, azelastine nasal spray is classified as a prescription-only medication in Hong Kong and must be obtained through a licensed healthcare provider.
