Hello, I understand that you have a question about any interactions between Focalin and you inhaler medication. This is always a good question to ask, whenever you are taking a new medication. Fortunately, inhaled medications have limited absorption, and do not usually get into your system enough to interact with other medications. I m not sure which inhaler you were prescribed. But there should not be any major interactions between it and Focalin. If the the inhaler was Albuterol, it is possible you might get more adrenaline effects like increased heart rate, Jitteriness, or insomnia, but normally the effect shouldn t be noticeable and it is safe to use both at the same time. Hope I have answered your query. Let me know if I can assist you further. Regards, Dr. Aaron Branch, General & Family Physician.