Many conditions can make you feel short of breath: Lung conditions such as asthma, emphysema, or pneumonia. Problems with your trachea or bronchi, which are part of your airway system. Heart disease can make you feel breathless if your heart cannot pump enough blood to supply oxygen to your body.
No you shouldn't mainly because it is not in your scope of practice. there will be legal consequences if you are caught and you are not licensed to administer medication