Just started Flonase two days ago but skipped yesterday. Took it today. Within an hour I had extreme weakness of all my limbs including diaphragm weakness. My muscles also felt like cramping. This kept up for a good half hour. Diaphragm still feels weak. I have multiple chemical sensitivities along with electrical sensitivities for over twenty years. I am now limited to three antibiotics to take. I am 60 and female. The Flonase is for extreme sinus pain. The doc did not see anything wrong with my sinuses.