Chemicals taken from foxglove are used to make a prescription drug called digoxin. Digitalis lanata is the major source of digoxin in the US.

Is Digitalis and foxglove the same?

The botanical name for foxglove is Digitalis purpurea. You might recognize "digitalis" as the name of a heart medicine. In fact, the medicine is derived from this plant, and that is why measuring digoxin (a form of digitalis) concentrations in the blood can help detect foxglove poisoning.

What part of foxglove has digitalis?

All parts of the plant, sap, seeds, leaves, flowers, nectar, contain digoxin, the leaves especially, even when dried. It is mostly animals, and small children attracted to the colourful tubular flowers that are affected by accidental ingestion.