Digitalis is a medication derived from the leaves of the foxglove plant. It is primarily used to treat heart conditions, particularly heart failure and atrial fibrillation. Digitalis works by increasing the strength of heart contractions and regulating heart rhythm, which helps improve blood flow and reduce symptoms associated with these conditions. The active compounds in Digitalis, such as digoxin, can have significant effects on the heart. However, it must be used carefully, as it has a narrow therapeutic range, meaning that the difference between a therapeutic dose and a toxic dose is small. Regular monitoring is essential to ensure safety and effectiveness.