A member asked:

What are the differences in action between nasal crom and a steroid like qnasal?

A doctor has provided 1 answer

Timing of action: Cromolyn works on certain, not all inflammatory cells to stabilize their surface and avoid release of chemicals of inflammation. It only works as a preventer of inflammation. Steroid works in all phases of inflammation and nearly all types of cells of inflammation so once there is symptom steroid works and cromolyn does not.

Answered 12/1/2013

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