From the nervous system: headache, dizziness, insomnia or drowsiness (varying degrees of severity), anxiety, akathisia, euphoria, depression, convulsive disorders, extrapyramidal disorders; with long-term treatment - tardive dyskinesia (smacking lips and lips, inflating cheeks, fast and wormlike movements of the tongue, uncontrolled chewing movements,uncontrolled movements of the arms and legs), late dystonia (rapid blinking or spasms of the eyelids, unusual facial expression or body position, uncontrolled curving movements of the neck, trunk, arms and legs) and malignant neuroleptic syndrome (hyperthermia, muscle rigidity, difficulty breathing or shortness of breath, tachycardia , arrhythmia, increase or decrease in blood pressure (AD), increased sweating, urinary incontinence, convulsive disorders, depression of consciousness).
From the side of the cardiovascular system: when used in high doses - reduced blood pressure, orthostatic hypotension, arrhythmias, tachycardia, changes in ECG (prolongation of the QT interval, signs of flutter and fibrillation of the ventricles).
From the digestive system: when used in high doses - decreased appetite, dry mouth, hypo-salivation, nausea, vomiting, diarrhea or constipation, impaired liver function, until the development of jaundice.
From the hematopoiesis: temporary leukopenia or leukocytosis, agranulocytosis, erythropenia and a tendency to monocytosis.
From the genitourinary system: retention of urine (with hyperplasia of the prostate gland), peripheral edema,pain in the mammary glands, gynecomastia, hyperprolactinaemia, menstrual cycle disorder, decreased potency, increased libido, priapism.
From the sense organs: cataract, retinopathy, blurred vision.
Allergic reactions: maculopapular and acne-like skin changes, photosensitivity, bronchospasm, laryngospasm.
Laboratory indicators: hyponatremia, hyper- or hypoglycemia.
Other: alopecia, weight gain.