Dofetilide
Written By Dr. Sakshi Jain
Reviewed By Dr. Rajeev SharmaLast updated 25 Nov 2025 | 09:34 AM (UTC)
Dofetilide Uses
Dofetilide is used in the treatment of Arrhythmia.
How Dofetilide works
Dofetilide belongs to a group of medications called class III antiarrhythmics, which help control irregular heart rhythms. Dofetilide helps keep the heart beating steadily by inhibiting a specific channel that controls heart rhythm. This helps the heart reset properly between beats and prevents irregular heartbeats, like atrial fibrillation. Importantly, it works only on this specific channel and does not affect other heart functions, like sodium channels or heart receptors.
Common side effects of Dofetilide
Headache, Chest pain, Dizziness
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Expert advice for Dofetilide
- Always take Dofetilide exactly as instructed by your doctor. Do not change the dose or stop taking it without a doctor’s guidance, even if you feel better.
- Seek immediate medical help if you experience severe dizziness, fainting, or a rapid or irregular heartbeat, as these may indicate a serious side effect.
- Attend all scheduled ECG tests to monitor your heart rhythm. These tests help detect any potential issues, like QT prolongation early.
- Consult your doctor immediately if you experience severe diarrhea, unusual sweating, vomiting, loss of appetite, or increased thirst, as these may indicate an electrolyte imbalance.
Frequently asked questions for Dofetilide
No, you should not stop taking Dofetilide without consulting your doctor, even if your symptoms improve.
Yes, regular ECG tests and kidney function checks are needed to monitor your heart rhythm and overall health.
Headache, chest pain, and dizziness are common side effects. Contact your doctor if these symptoms worsen or persist.