Thuja

How does Thuja work?

Thuja contains chemicals that might fight viruses. It also contains a chemical called thujone that can cause brain problems.

Are there safety concerns?

There isn't enough information to know if thuja is safe when used as a medicine. Thuja in large amounts can cause queasiness, vomiting, painful diarrhea, asthma, seizures, and death.

Thuja products can contain a chemical called thujone. Thujone can cause low blood pressure, asthma, seizures, and death.

Do not take thuja if:
  • You are pregnant or breast-feeding.
  • You have seizures or epilepsy.
  • You have an immune system disorder such as multiple sclerosis (MS), lupus (systemic lupus erythematosus, SLE), rheumatoid arthritis (RA), or other immune system conditions called "autoimmune disease."

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.