How does Boxwood work?

Boxwood might stop viruses from reproducing, but there isn't enough scientific evidence to support this theory.

Are there safety concerns?

Boxwood extract (SPV 30) appears to be safe for most people when taken up to 16 months. It sometimes causes diarrhea or stomach cramps.

Do not use whole boxwood leaf. It has serious side effects that the leaf extract doesn't seem to have. Whole boxwood leaf can cause poisoning, including life threatening side effects such as seizures, paralysis, and death.

Do not take boxwood if:
  • You are pregnant or breast-feeding.

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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.