Overdose : מינון יתר

4.9   Overdose
Symptoms
In case of overdose hyperkalaemia, hyperhydration, acid-base imbalances, oedema, particularly hypernatraemia, hyperchloraemia or potassium intoxication and electrolyte disorders can result.
The symptoms of hyperkalaemia are primarily cardiovascular disorders and include hypotension, cardiac arrhythmia, heart block, ECG abnormalities with development of biphasic curves and cardiac arrest. Other symptoms include paresthesias of extremities, muscle or respiratory paralysis, areflexia, weakness and mental confusion Rapid increase of the serum sodium level in patients with chronic hyponatraemia may lead to the osmotic demyelination syndrome (see section 4.4).

Treatment
Immediate interruption of the infusion, ECG monitoring, if necessary enhancement of urine flow and thus fluid and electrolyte excretion, administration of sodium bicarbonate and insulin. If insulin is given to increase cellular uptake of potassium, glucose should be given to avoid hypoglycaemia. In patients with persistent ECG abnormalities e.g. calcium gluconate may be administered to antagonise the cardiotoxic effects of potassium.
Haemodialysis or peritoneal dialysis may be required in patients with renal insufficiency.