Which steroid though?
Albuterol inhalers can actually do the opposite, because Albuterol is related to the steroid "Clenbuterol", which causes thermogenisis, which burns fat.
Albuterol also increases heart rate. Believe me, you don't want to hit an albuterol inhaler a bunch of times or your heart will feel like it's gonna blow out of your chest.
But albuterol inhalers are the only kinds of I have any experience with.
I suppose it depends on which steroid inhaler you're using.