To further what rebekah said - I'm on atrovent. No where in any of my patient information or on the box does it list soy or peanuts as an ingredient, and it has now mention of worries for the peanut or soy allergic. I'm guessing that the soy lecithin was phased out when they made the switch to HFA propellant.
Combivent inhalers do have a warning for PA and soy allergies - you can find it on the front page of their website:
http://www.combivent.com/ For those unfamiliar, a Combivent inhaler is albuterol and ipratorium bromide (atrovent) in one inhaler. If you are PA or soy allergic and asthmatic, you should keep this in mind. Generic combivent nebulizer solution is safe (at least the kind that my doc uses), and luckily, if you are in the hospital, you are probably more likely to get that.