From the central and peripheral nervous system: headache, dizziness, drowsiness, weakness, motor anxiety, loss of consciousness, convulsions, trismus, tremor, visual and auditory disorders, nystagmus, cauda equina syndrome (paralysis of the legs, paresthesia), paralysis of the respiratory muscles, impaired sensory and motor conduction, respiratory paralysis center often develops with subarachnoid anesthesia.
From the side of the cardiovascular system: increase or decrease in blood pressure, peripheral vasodilation, collapse, bradycardia, arrhythmias, chest pain.
From the urinary system: involuntary urination.
From the digestive system: nausea, vomiting, involuntary defecation.
From the side of the blood: methemoglobinemia.
Allergic reactions: skin itching, skin rash, other anaphylactic reactions (including anaphylactic shock), urticaria (on the skin and mucous membranes), dizziness, weakness, lowering blood pressure. In these cases, stop using the drug and consult a doctor.
Local Reactions: in the first days of the drug, there may be urges for defecation and a feeling of discomfort, which later pass independently and do not require the drug to be withdrawn. Rarely, hyperemia and itching in the anal area (when used in high doses).