Warning
This herb is deadly poison. This is a powerful herb/drug. Use only under medical supervision. Even touching the plant with bare skin has been known to cause rashes, headache, and nausea.
First year’s leaf growth (rosette) has been mistaken for leaves of Comfrey, with fatal results. Therapeutic dose of Digitalis is dangerously close to lethal dose. Do not take this herb internally especially if taking Digitalis. This herb is for use by physicians only.