Which nasal spray should i buy for my allergies?

Talk with your doc: The best for nasal allergies is a corticosteroid nasal spray (flonase, nasonex, (mometasone) rhinocort, etc.) that must be prescribed by your doctor. These all work about the same, though some people may respond better to 1 vs another. Dryness can be helped by otc saline sprays. Otc nasal rinses (e.g. Neti pot) can help as well. Avoid using otc decongestant sprays for more than ~3 days at a time. See your md.