Flecainide Orion
Flecainide Orion is a medication for heart rhythm disorders that regulates the heart rate and rhythm.
Form
depotkapseli, kova
Strength
200 mg
Active Ingredient
Flecainide acetate
Manufacturer
Orion Corporation
How to Use
Dosage
The usual dose is one 200 mg prolonged-release capsule once a day, but sometimes one 100 mg prolonged-release capsule per day is enough.
Method
Swallow the capsules whole with liquid. Flecainide Orion prolonged-release capsules can be taken with or without food.
Important
The maximum daily dose is two 200 mg prolonged-release capsules per day (400 mg/day).
Possible Side Effects
COMMON
- •Dizziness (usually temporary)
- •Vision problems like double vision or blurred vision
- •Heart rhythm problems
- •Shortness of breath
- •Weakness
- •Fatigue
- •Fever
- •Swelling
RARE
- •Nausea (feeling sick)
- •Vomiting (being sick)
- •Constipation
- •Stomach ache
- •Loss of appetite
- •Diarrhea
- •Heartburn
- •Gas
- •Allergic skin reactions like rashes
- •Hair loss
- •Low counts of blood cells (red, white, or platelets)
- •Hallucinations (seeing or hearing things that aren't there)
- •Depression
- •Confusion
- •Agitation
- •Memory problems
- •Trouble sleeping
- •Feeling numb or tingling (sensory disturbances)
- •Clumsiness
- •Reduced sensation
- •Increased sweating
- •Fainting
- •Tremors
- •Facial flushing
- •Drowsiness
- •Headache
- •Nerve damage in arms or legs
- •Seizures
- •Uncontrolled movements
- •Ringing in ears (tinnitus)
- •Spinning sensation (vertigo)
- •Lung inflammation
- •High liver enzyme levels
- •Jaundice (yellow skin/eyes)
- •Severe hives
- •Increased DNA antibodies (may be linked to inflammation)
- •Sensitivity to light
- •Deposits in the cornea of the eye
- •Changes in heart's electrical activity (ECG)
- •Heart conduction problems
- •Cardiac arrest
- •Slow or fast heart rate
- •Heart failure
- •Chest pain
- •Low blood pressure
- •Heart attack
- •Palpitations
- •Ventricular fibrillation (a serious irregular heartbeat)
- •Appearance of a hidden Brugada syndrome
- •Lung diseases (like scarring in lungs)
- •Liver failure
- •Joint pain
- •Muscle pain
Important Warnings
- Do not take this medicine if you are allergic to flecainide or any other ingredient in this medicine.
- Do not take if you have severe heart circulatory failure with very low blood pressure or a slow heart rate.
- Do not take if you have Brugada syndrome (a hereditary condition predisposing to severe arrhythmias).
- Do not take if you have heart failure.
- Do not take if you have heart conduction disorders, such as sick sinus syndrome or atrioventricular block.
Show 8 more warnings
- Do not take if you have had extra heartbeats after a heart attack, such as ventricular premature beats or ventricular tachycardia.
- Do not take if you have long-lasting atrial fibrillation that has not been converted to a normal rhythm.
- Do not take if you have severe heart valve disease.
- Talk to your doctor if you have structural heart disease.
- Talk to your doctor if you have had heart surgery and experienced atrial fibrillation afterwards.
- Talk to your doctor if you have kidney or liver impairment.
- Talk to your doctor if you have abnormal sodium or potassium levels in your blood.
- Talk to your doctor if you have a pacemaker.
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)