LANOXIN-125, generically known as digoxin, is a medication primarily used in the treatment of various heart conditions, including atrial fibrillation, atrial flutter, and sometimes heart failure that cannot be managed by other medications alone. It belongs to a class of drugs known as cardiac glycosides, which work by increasing the force of heart muscle contractions and regulating heart rate. This helps improve blood circulation and reduces symptoms associated with heart failure such as shortness of breath and swelling in the legs. LANOXIN-125 refers to the dosage strength of 125 micrograms of digoxin. It is important for patients to follow their healthcare provider's instructions closely when taking this medication, as the correct dosage can vary based on individual health needs and conditions.