Lanoxin Syrup is a medicine used for the treatment of heart failure in combination with other medicines. It helps to provide symptomatic relief by making the heart pump blood more efficiently. This medicine is also used to treat abnormal heart rhythm (arrhythmia). Lanoxin Syrup restores and maintains a normal and steady heartbeat. It should be taken regularly as advised by the doctor. You may take it with or without food but it is better to take this medicine at a fixed time. This medicine should not be stopped abruptly without consulting the doctor as this can worsen your condition. Regular follow-up with your doctor is advised while using this medicine. Common side effects of this medicine include nausea, vomiting, diarrhea, dizziness, and visual disturbances. Consult your doctor if these effects bother you. This medicine is used with caution for some people. Thus, you must inform the doctor if you are suffering from any kidney disease. Also, let your doctor know if you are pregnant or breastfeeding and about all the other medications that you are taking regularly. Your doctor may advise for regular monitoring of kidney function while you are taking this medicine.