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While generally considered safe, ashwagandha can cause side effects in some people. Research indicates potential side effects include:

  • Digestive upset (mild nausea, diarrhea)
  • Drowsiness
  • Headache

Important interactions: Ashwagandha may interact with medications for thyroid disorders, diabetes, blood pressure, and immunosuppressants. It should be avoided during pregnancy and by those with autoimmune conditions. Those with hormone-sensitive prostate cancer should consult their healthcare provider as ashwagandha may increase testosterone levels.

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Last Updated: August 12, 2025

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