There are various symptoms of high caffeine intake. Among them, gastrointestinal symptoms are nausea, vomiting, diarrhea, abdominal pain, hyperactive bowel sounds etc. My question is: do these symptoms appear only in case of oral ingestion or in case of IV route too? You could describe generically i.e. other cases where gastrointestinal symptoms - which occur via oral route - may or may not occur via IV route. Thanks!


  • 1
    Where do you think nausea arises from? Feb 5 '18 at 3:41
  • Welcome to HealthSE! Please take the tour and read the help center. Please improve your question with the help of prior comments and How to Ask. Feb 5 '18 at 14:51
  • How much caffeine are you taking ? I take 500 mg with no side affects. Feb 5 '18 at 22:10

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