What are the possible side effects of digoxin?

If you experience any of the following serious side effects, stop taking digoxin and seek medical attention or contact your doctor immediately:

• an allergic reaction (difficulty breathing; closing of the throat; swelling of the lips, tongue, or face; or hives)
• a severe headache, fainting, or extreme drowsiness or dizziness;
• irregular heartbeats
• slow heartbeats (fewer than 60 beats per minute)
• abnormally fast heartbeats
• vision changes (e.g., yellow-green or blurred vision);
• hallucinations
• abnormal or psychotic behavior.

If you experience any of the following less serious side effects, continue to take digoxin and talk to your doctor if you experience

• decreased appetite and diarrhea
• unusual tiredness or weakness
• depression
• nausea or vomiting
• drowsiness or dizziness
• decreased sex drive
• enlarged breasts in males.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome.