If you want, you can direct the inhaler via a toilet paper roll (the core, not the whole thing). Exhale as completely as possible, put one end of the roll in your mouth and put the inhaler in the other end. Trigger the inhaler (push down on the ones I have) and at the same time inhale for a count of 6 done at medium speed. Hold your breath for another 6 count, and exhale for a 6 count.

You might also be able to get a cardboard tube from the doctor.