I am only soy allergic, not PA, but I take an Atrovent inhaler pretty regularly and have never had any problems. My newest box says nothing about soy in the inactive ingredients. Note: My soy allergy is mild, and I can eat soy lecithin.
However, there is a recommendation that I could find online to avoid using a Combivent inhaler (albuterol and ipratorium bromide - the active ingredient in Atrovent) for people with PA and soy allergies. However, I can't find any warnings regarding Combivent nebulizer solution.