My sis gave my some nasal spray to take for my dizziness, she seems to think its my sinuses. will sinuses cause dizziness nauseated and blurry. dr?

See details: Stop using it. The symptoms do not suggest sinusitis. See a doctor not your sister.

See Below: Chronic sinus inflammation can cause a sensation of light headedness when it is flared-up. However, if you feel like the room is spinning or feel like you are going to black out, that is not allergies. You should never use a medication that is not recommended for you by a licensed healthcare provider. See your doctor to get appropriate care.