Tambocor
Tambocor injection is a medicine for arrhythmia that helps regulate the heart's rate and rhythm.
Form
injektioneste, liuos
Strength
10 mg/ml
Active Ingredient
Flecainide acetate
Manufacturer
Viatris Oy
How to Use
Dosage
Your doctor will determine the right dose for you, usually 2 mg/kg as a slow injection.
Method
This medicine is given only directly into a vein.
Important
The maximum dose within 24 hours is 600 mg.
Possible Side Effects
COMMON
- •Dizziness (usually temporary)
- •Vision problems, such as double vision or blurred vision
- •Arrhythmias
- •Shortness of breath
- •Weakness
- •Fatigue
- •Fever
- •Swelling
RARE
- •Nausea, vomiting
- •Constipation, stomach pain, loss of appetite, diarrhea, heartburn, gas
- •Allergic skin reactions, such as rash and hair loss
- •Decreased red blood cell, white blood cell, or platelet counts
- •Hallucinations, depression, confusion, agitation, memory loss, insomnia
- •Sensory disturbances, clumsiness (ataxia), reduced sensation
- •Increased sweating, fainting, tremors, facial flushing, drowsiness, headache
- •Peripheral nerve dysfunction (peripheral neuropathy), convulsions, involuntary movements (dyskinesia)
- •Ringing in ears (tinnitus), vertigo, pneumonia
- •Elevated liver enzymes (with or without jaundice), severe hives
- •Increased DNA antibodies (with or without systemic inflammation), light sensitivity, corneal deposits
- •ECG changes, heart conduction disturbances, cardiac arrest, slow or fast heart rate, heart failure, chest pain, low blood pressure, heart attack, palpitations, ventricular fibrillation
- •Manifestation of previously hidden Brugada syndrome
- •Lung diseases (pulmonary fibrosis, interstitial lung disease)
- •Liver failure
- •Joint pain, muscle pain
Important Warnings
- Do not use if you are allergic to flecainide or any other ingredients in this medicine.
- Do not use if you have certain severe heart conditions, such as very low blood pressure, slow heart rate, Brugada syndrome, heart failure, certain conduction disorders, or severe heart valve disease.
- Tell your doctor if you have a history of heart attack, heart surgery, kidney or liver problems, abnormal salt levels in your blood, low blood pressure, slow heart rate, a pacemaker, or heart valve disease.
- Not recommended for pregnant or breastfeeding women without doctor's guidance.
- Avoid driving or operating machinery if you experience side effects like dizziness or vision problems.
Use in Elderly Patients
Category D
Avoid use in older adults. Start the treatment only in specialized care. Risk of QT prolongation. Reduce the dose in severe renal impairment. A significant adverse effect is torsades de pointes ventricular tachycardia. Consider the numerous potential interactions. (updated 19.5.2025)