Lobelia (Lobelia inflata)

Tier 4 — risky / avoid · Respiratory · Emetic · Toxic

Sometimes called "Indian tobacco" and historically used for respiratory conditions, but the therapeutic dose is dangerously close to the toxic dose. Causes violent vomiting, respiratory depression, convulsions, and potentially coma at doses only slightly above those used medicinally. FDA classified it as a dangerous herb. No safe supplemental use exists.

Dose: AVOID — narrow therapeutic window; vomiting, respiratory depression, and convulsions at slightly elevated doses