Symptoms: stimulation of the central nervous system (anxiety, anxiety, confusion, hyperpnoea, tachycardia, increased blood pressure with reddening face, nausea, vomiting, tremor, convulsive disorders), hearing impairment, dizziness, CNS depression (loss of ability to speak, loss of consciousness, coma, muscle atony , vasomotor palsy, including weakness, pallor, dyspnea, death due to respiratory paralysis); symptoms of cardiovascular depression (bradycardia, arrhythmia, ventricular fibrillation, lowering blood pressure, cyanosis, heart failure).
At the first manifestations of the toxic effect of the drug, it is necessary to stop the injection and give the patient a horizontal position with raised lower limbs and provide airway patency. It is necessary to monitor the parameters of hemodynamics (number of heartbeats, blood pressure).It is always recommended, even if the symptoms of intoxication do not seem to be severe, to put an intravenous catheter in order, if necessary, to be able to immediately perform intravenous administration of the required medications.
In the case of breathing disorders, depending on their severity, oxygen is recommended, if there is an indication for an artificial respiration, an endotracheal intubation and artificial ventilation. The use of analeptic drugs of central action is contraindicated.
In case of involuntary muscular twitching or generalized convulsions, intravenous administration of barbiturates of short or ultrashort action is indicated. The introduction should be done slowly under the constant control of the parameters of hemodynamics and respiration and with the simultaneous supply of oxygen.
Often a bradycardia or a sharp drop in blood pressure can be eliminated by giving the patient a horizontal position with raised legs. With severe circulatory disturbances and shock, oute depending on their cause, the injection of the drug should be discontinued,to provide the patient with a horizontal position with raised legs, oxygen inhalation and intravenous infusion of balanced electrolyte solutions, glucocorticosteroids (250-1000 mg of methylprednisolone), if necessary, plasma substitutes, albumin. With the development of circulatory collapse and increasing bradycardia, a slow intravenous injection of a solution of epinephrine (0.0025-0.1 mg) under the control of cardiac rhythm and blood pressure was shown. If it is necessary to administer doses exceeding 0.1 mg epinephrine should be administered infusion, the infusion rate should correlate with the heart rate and blood pressure level.
Severe tachycardias and tachyarrhythmias can be stopped by the administration of antiarrhythmic drugs, with the exception of nonselective beta-blockers.
Increase in blood pressure in patients with arterial hypertension, if necessary, should be reduced with the help of vasodilators.