Has anyone had bad adverse reactions following nuclear stress test?

Yes: May cause heart attack.But, without the information gained from a stress test we are in the dark about your heart health.

Yes: There are some side effects with some types of stress test. The chemical stress tests tend to have a few more side effects than exercise. Fortunately these are usually gone within a few minutes to have an hour. There are also some rare complications which can include death heart attack and arrhythmias.