This study is testing a nasal spray for people with seasonal allergic rhinitis. This is a type of allergy that causes sneezing, runny nose, and itchy eyes during certain times of the year. The researchers want to see if their new spray works as well as a similar spray already on the market.

To join the study, you need to be between 18 and 65 years old and have been diagnosed with moderate to severe seasonal allergies. You also need to be able to use the nasal spray correctly and agree to use birth control if you're a woman who can get pregnant.

If you join, you'll be randomly assigned to one of three groups. You might get the test spray, the existing spray, or a placebo (a fake spray). Neither you nor the researchers will know which one you’re using. The study will check how well the spray works and if it's safe to use.

• Participants must attend several visits and follow instructions carefully.
• The study has strict rules about past medical history and medications.
• Participation is voluntary, and you can leave the study at any time.