A member asked:

Tomorrow i'm getting a nuclear stress test w cardiolite. worried about side effects and reaction to the thallium or whatever they use. should i worry?

3 doctors weighed in across 2 answers

Isotopes quite safe: Dyes are not used during nuclear stress tests. Trace radioactive isotopes are but there are no significant reactions to these minute doses used considering the thousands of tests done around the globe daily unless one has a history of being allergic to the thallium or cardiolite.

Answered 11/28/2017

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Stress...: Is it an exercise or pharmacologic stress test? It is likely an exercise treadmill test. You should not feel any side effects from thallium or cardiolite. People sometimes have side effects from the pharmacologic agents like adenosine, persantine, or Lexiscan but if you can exercise adequately, you probably won't need the pharmacologic agent.

Answered 6/22/2018

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Why would you have an adenosine/cardiolite stress test done?

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