Hi,
I would like to ask you what do you mean by word slow heart beat because it might mean a little different medically.
Usually inhalers are responsible for tachycardia(fast heart rate than slow),specially the drug taken by you. These are very common drugs that might cause you to have a little bit of tremors and might cause you to feel that you are feeling your heart beat,or it might also cause headache,dizziness,or may be vomiting.
I believe you can ask your physician to change your inhaler ...
Read Complete Answer