Nasal decongestants and allergic rhinitis

Allergic rhinitis is an immune response to an inhaled trigger. The nasal lining swells and produces mucus, leading to congestion, sneezing, itching, or a runny nose. A decongestant narrows swollen blood vessels in the nasal lining, so airflow may improve temporarily. It does not remove the trigger or control the underlying allergic response. Persistent symptoms can affect sleep and may occur alongside allergic conjunctivitis, asthma, chronic cough, sinusitis, or chronic sinusitis.

Reducing exposure to a known trigger and rinsing the nose with saline may help. A clinician or pharmacist can advise on an antihistamine or an anti-inflammatory nasal spray, which may be more useful for ongoing allergic symptoms. Use a decongestant spray only as directed and for the advised short period; longer use can cause rebound congestion. Oral decongestants may cause palpitations, restlessness, or sleep problems and may interact with medicines. Ask before use if you have high blood pressure, heart disease, glaucoma, thyroid disease, are pregnant, or take regular treatment.

Arrange review when symptoms are hard to control, disturb sleep, trigger wheezing, or keep returning despite sensible measures. Seek urgent help for swelling of the lips or tongue, severe breathing difficulty, faintness, or a rapidly worsening reaction. Facial pain, fever, or persistent loss of smell may point to sinus complications and should be assessed.

Is my pattern consistent with allergic rhinitis? Which treatment controls inflammation rather than only opening the nose? Could my other medicines or conditions make a decongestant unsuitable?