1. American Family Physician. Nasal Sprays: how to use them correctly. Available at:
  2. Cleveland Clinic, Center for Continuing Education. Sinusitis. Available at: 
  3. American Academy of Otolaryngology – Head and neck surgery. Sinusitis. Available at:
  4. Mayo Clinic. Chronic sinusitis. View here:
  5. Healthline. What causes stuffy nose. View here:
  6. Wedmd. How to treat nasal congestion and sinus pressure. View here:
  7. Just the Right Dose: Your Smart Guide to Prescription Drugs & How to Take Them Safely. Marijke Vroomen Durning
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