Mental Health Home > L-Tryptophan Side Effects

Bothersome Side Effects

Not all L-tryptophan side effects are dangerous; some are merely bothersome. Such reactions include:
  • Heartburn or indigestion
  • Loss of appetite
  • Drowsiness
  • Abdominal pain (stomach pain)
  • Belching or gas
  • Nausea and vomiting
  • Diarrhea
  • Headaches
  • Lightheadedness
  • Dry mouth
  • Blurred vision.

Final Thoughts

You may experience some or none of the L-tryptophan side effects listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have problems with a medicine that you have never tried.
Therefore, make sure to let your healthcare provider know if you develop any side effects while taking this supplement, or if something "just does not seem right." While it may not be related to L-tryptophan, your healthcare provider will be able to diagnose and treat the problem.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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