Digoxin
Lanoxin (digoxin) is a cardiac glycoside used to treat heart failure and certain irregular heart rhythms, particularly atrial fibrillation. It helps the heart beat more forcefully while also slowing down the heart rate to improve overall cardiac function.
Lanoxin is a heart medication that strengthens heart contractions and helps control irregular heart rhythms in patients with heart failure and atrial fibrillation.
Key facts at a glance
- RxNorm
- 202988
- Generic
- Lanoxin
- Class
- brand-name
- Brands
- —
- Availability
- rx
- Lactation
- unknown
- Routes
- —
- Forms
- —
- Regions
- US, EU, CN, JP
- Monitoring
- —
This page is for informational purposes only.
Do not use this information to diagnose yourself or to replace a physician's advice. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. If you believe you are experiencing a medical emergency, call your local emergency number immediately.
Lanoxin is used to treat heart failure (to help the heart pump more effectively) and atrial fibrillation/atrial flutter (to help control heart rate). It may be used alone or in combination with other heart medications.
Lanoxin works by inhibiting the sodium-potassium ATPase enzyme in heart cells. This leads to increased calcium levels inside cardiac muscle cells, resulting in stronger heart contractions. It also affects the electrical conduction system of the heart, helping to slow the heart rate.
Lanoxin has a narrow therapeutic index, meaning the difference between therapeutic and toxic doses is small. Regular monitoring of blood levels and kidney function is important. Side effects may include nausea, vision changes, irregular heartbeat, and dizziness. Many drug interactions are possible, particularly with diuretics, certain antibiotics, and other heart medications.
Official drug label
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed July 26, 2026. · Read our editorial policy