Information on using Budesonide via nebulizer

Looking for clear instruction on using Budesonide for potential respiratory illness to be use via nebulizer. What form of Budesonide to get, what dosing and frequency via nebulizer. I was not able to find it via search in the form. Please direct me if this has already been answered. Thank you!

Following on: Budesonide has been on the radar since early in COVID. I eventually got what I could OTC, a 32mcg/spray nasal allergy spray. Should I assume that’s irrelevant for lung issues? Is there anything useful OTC, and if not, how does one rationalize an Rx for a doctor?