Which test are you referring to?

If you mean the DMPS challenge test I did have some severe side effects. Actually, the first test didn't cause any problems but after three or four infusions all of my symptoms were aggravated. I stuck with it hoping that it would speed up my recovery but DMPS should be used with great caution.

If you are referring to the SPECT scans they didn't cause any problems. Except for the intravenous infusions of a radioactive substance (radiation is about equal to that of a chest X-Ray for each infusion) the test is non-invasive and painless.