Digoxin is a medication derived from the digitalis plant. It helps the heart beat stronger and more regularly, so it is used to treat heart failure and atrial fibrillation.

Inform your doctor of your medical history before starting digoxin, especially if you’ve had a serious heart condition, thyroid disorder, or Wolff-Parkinson-White Syndrome. Also inform your doctor if you become pregnant or breast-feed. Try to take digoxin at the same time each day. Do not cease use suddenly. If you miss a dose, skip it if it’s less than 12 hours until your next dose; otherwise, take it as soon as you remember.

Do not use digoxin if you have ventricular fibrillation or if your’e allergic to it. Avoid overheating or exercising in hot weather, as digoxin overdose can occur more easily if you are dehydrated. Digoxin may interact with other drugs, so make sure your doctor knows what other medications you’re on.

Get emergency help if you suspect an overdose or allergic reaction. Overdose may be fatal, and includes symptoms like nausea, vomiting, loss of appetite, and fatigue. Contact your doctor as soon as possible if you experience serious symptoms such as: digestion problems, fast/slow/uneven pulse, lightheadedness, bloody or tarry stools, unusual thoughts/behaviors, tender/swollen breasts, vision issues, and growth delays or weight loss in children. Other side effects may include: rash, nausea and diarrhea, weakness and dizziness, headaches, and anxiety or depression.