What it is used for
- Certain irregular heart rhythms, such as atrial fibrillation
- Some types of heart failure
How it works
Digoxin helps the heart beat more strongly and, in some rhythm problems, more slowly and regularly. This can improve symptoms of heart failure and help control a fast, irregular heartbeat.
How it is taken
Available as a tablet, an oral liquid, and an injection given by a healthcare professional. It is usually taken by mouth once a day. Take it exactly as your doctor or pharmacist directs and follow the label, as the safe range is narrow; your clinician may check your blood levels, kidney function, and potassium.
No doses here on purpose. The right strength and schedule depend on you — only a doctor or pharmacist should set them. Always follow your prescription and the label.
Common side effects
- Nausea or loss of appetite
- Diarrhoea
- Tiredness
- Headache
- Dizziness
Serious effects — get help
- Signs of too much digoxin such as severe nausea or vomiting, confusion, or visual changes including seeing yellow or green halos (seek urgent care)
- A very slow, fast, or irregular heartbeat
- Fainting
- New or worsening palpitations
If a reaction is severe — for example trouble breathing, swelling of the face or throat, or collapse — go to the nearest emergency room now or call your local emergency number. Do not wait for an online consultation.
Interactions to watch
- Diuretics that lower potassium (raise toxicity risk)
- Amiodarone, verapamil, and some other heart medicines (can raise levels)
- Certain antibiotics and antifungal medicines
- Some calcium and antacid products
- St John's wort (can lower levels)
Who should take care
- Tell your clinician about kidney problems, as the medicine can build up
- Keep potassium levels steady, as low potassium increases toxicity risk
- Attend monitoring blood tests as requested
- Learn the warning signs of too much digoxin
- Mention all medicines and supplements, as many interact