Overdose Symptoms
From the central nervous system
Excitation of the central nervous system: anxiety, fear, confusion, hyperpnoea, tachycardia, increased blood pressure with reddening face, nausea, vomiting, tremor, twitching, tonic-clonic convulsions.
Inhibition of the central nervous system: dizziness, hearing loss, loss of speaking ability, stupor, unconsciousness, atony, paresis of the vasomotor nerves (weakness, pallor), dyspnea, death from paralysis of the respiratory tract.
From the side of the cardiovascular system
Depression of the cardiovascular system: bradycardia, arrhythmia, fibrillation of the ventricles, a drop in blood pressure, cyanosis, cardiac arrest.
Emergency help and countermeasures
If there are first signs of side effects or intoxication, such as dizziness, motor agitation, confusion or stupor during the administration of the drug, stop its administration and move the patient to a horizontal position with raised lower limbs. It is necessary to ensure the patency of the airways and monitor the parameters of hemodynamics (the number of heartbeats and blood pressure).
It is recommended to release access to the veins (even with symptoms that do not seem serious) in order, if necessary, to be able to immediately carry out intravenous administration of necessary medications.
In case of breathing disorders, depending on their severity, oxygen supply is recommended, if necessary - artificial respiration, and under certain circumstances - endotracheal intubation and controlled artificial ventilation of the lungs.
Muscular jerking and generalized convulsions can be stopped by intravenous injection of a high-speed antispasmodic agent (for example, suxamethonium chloride, diazepam). It is also recommended to carry out artificial ventilation (oxygen supply).
A sharp drop in blood pressure, tachycardia or a bradycardia can be eliminated by simply moving the patient to a horizontal position with raised lower limbs.
In severe circulatory disorders and shock of any origin, the drug should be discontinued. It is necessary to move the patient to a horizontal position with raised lower limbs and release the airways (insufflation of oxygen). Intravenous administration of balanced solutions of electrolytes, glucocorticosteroids (250-1000 mg of prednisolone or an equivalent amount of a derivative, for example, methylprednisolone), replacement infusion therapy (if necessary, additional plasma substitutes, for example, human albumin).
With the development of circulatory collapse and increased bradycardia intravenously is immediately introduced epinephrine (adrenalin).After diluting 1 ml of a 0.1% solution of epinephrine (1: 1000) to 10 ml, using the resulting 0.01% solution of epinephrine (1: 10,000), slowly introduce first 0.25-1 ml (0.025-0.1 mg epinephrine), controlling the pulse and blood pressure (carefully: there may be heart rhythm disturbances!). Do not exceed a single intravenous dose of 1 ml (0.1 mg epinephrine). If it is necessary to administer doses exceeding a single intravenous dose of epinephrine 0.1 mg, epinephrine should be administered with the infusion solution, adjusting the dropping rate of administration in accordance with the pulse rate and arterial pressure.
Strong tachycardia and tachyarrhythmia can be removed with antiarrhythmic drugs, excluding non-selective beta-blockers, such as, for example, propranolol. In such cases, oxygen supply and circulation control are necessary.
Increased blood pressure in patients with arterial hypertension, if necessary, is stopped with the help of peripheral vasodilators.