 [ Symptoms ] not able to breathe when exercising when i have used my ventolin [ Disease ] hi dear actually after using ventolin you should be able to breathe quite easily and should not have any problems but given the history of anxiety and depression that you have it causes shortness of breath more so when you exercise increased heart rate causes less intake of oxygen and causes breathing problems its usually temporary though and shouldnt be worried about but a heart rate of 240m definitely needs attention and i suggest you should take a cardiologist opinion thanks