The key thing would be to optimise his asthma control. If he still reacts with wheezing and shortness of breath, the 2 triggers, it means that his asthma is uncontrolled. You need to chat to your doctor about increasing some of the doses of the inhalers adding additional inhalers or other anti-asthma medication until he is well controlled. This should sort out the problem. If the racing heart issue (palpitations) continues and no other cause can be found, then a very small dose something to slow down the heart a little will abrogate these symptoms. It can be terrifying to have these kinds of symptoms. However, that part can be discussed with your cardiologist (if you ever get to that point). I feel if asthma control is optimised things will get better. It's important to treat the nose and the sinuses with appropriate anti-inflammatories as well as the lower respiratory tract.
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