Some personal observations on aspirin.
I took 100mg coated aspirin once daily for the therapeutic benefits, some time back.
Over a period of time I developed very mild asthma. It was not to an extent that caused me breathing difficulties, but was there non the less, as a slight wheeze, sometimes.
During a stress ECG my reduced air flow showed up as me being very unfit, yet I exercised on a regular program and I knew there was nothing unfit about me.No doubt the poor airflow to the lungs under high workload showed up as "unfit" in the view of the Cardiologist.
I went off the aspirin and the doctor had my lung a nd heart health checked by specialists. A couple of months later the Respiritory function test, done under stress in a laboratory, showed above average lung function for age. Heart was determined to be normal as well.
I believe it was shortness of air intake during the stress ECG caused by the aspirin. As soon as I got off it, and some time passed, my lung function was fine. This is my layman opinion only I stress.
The most recent stress ECG was done without the slightest hassle. Hardly raised a sweat.
While all this is non scientific I believe the aspirin was a problem in my case, and will not take it in future without some sound medical reason.
I provide this info for what its worth. Check with your doctor before taking daily doses.