LANATOSIDE C - Watsons Health


Lanatoside C is a drug that acts on the heart. It increases the amount of calcium inside cells to increase contraction of the heart muscles.

Lanatoside C is used in the treatment of abnormal heart rhythms such as atrial fibrillation or flutter.

Lanatoside C should not be used by people with the following heart conditions:

  • Woff-Parkinson-White syndrome
  • Hypertrophic obstructive cardiomyopathy
  • Ventricular fibrillation

Lanatoside C can give rise to the following side effects:

  • Nausea
  • Vomiting
  • Anorexia
  • Diarrhoea
  • Abdominal pain
  • Headache
  • Facial pain
  • Fatigue
  • Weakness
  • Dizziness
  • Drowsiness
  • Disorientation
  • Mental confusion
  • Bad dreams
  • Delirium
  • Acute psychoses
  • Hallucinations
  • Convulsions
  • Blurred vision
  • Disturbance in colour vision
  • Thrombocytopenia
  • Gynaecomastia
  • Heart failure
  • Supraventricular or ventricular arrhythmias
  • Conduction abnormalities of the heart


  • Take extra precautions in people with the following conditions:
  • Heart disease
  • Acute myocarditis
  • Chronic constrictive pericarditis
  • Heart attack
  • Severe heart failure
  • Severe lung disease
  • Low blood potassium levels
  • Low magnesium levels
  • Increased calcium levels
  • Kidney problems
  • Babies
  • Elderly
  • Breastfeeding



Lanatoside C can interact with the following medicines:

  • Drugs that produce electrolyte imbalance (e.g. diuretics, amphotericin B, corticosteroids, corticotropin, edetate disodium, laxatives, sodium polystyrene sulfonate, glucagon, large doses of dextrose, dextrose-insulin infusions)
  • Calcium
  • β-blockers
  • Calcium-channel blockers
  • Sympathomimetics
  • Rauwolfia alkaloids

If you think you have taken Lanatoside C more than the recommended dose, seek medical help immediately.


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