Sinusitis can be treated with various options including over-the-counter medication, prescription nasal spray and drops, antibiotics, and surgical treatments. Over-the-counter medication, such as antihistamines and decongestant nasal sprays, can provide short-term relief, but may not be suitable for everyone due to underlying health conditions. It's essential to consult with a pharmacist before taking any medication. Nasal sprays, including antihistamine, decongestant, corticosteroid, and saline sprays, can also be used to relieve symptoms. While some are available over the counter, others require a prescription. Corticosteroid nasal sprays, which reduce swelling and inflammation, are typically prescribed by a doctor, but can now be obtained for free through the NHS Pharmacy First service.