From the digestive system: nausea, diarrhea, vomiting, abdominal pain, flatulence, decreased appetite, cholestatic jaundice (especially in patients with liver disease), hepatitis, hepatonecrosis.
From the nervous system: dizziness, headache, fatigue, anxiety, tremor, insomnia, nightmarish dreams, peripheral paralysis (anomaly of perception of pain), increased sweating, increased intracranial pressure, confusion, depression, hallucinations, and other manifestations of psychotic reactions (occasionally progressing to conditions in which the patient can do harm to himself), migraine, fainting, thrombosis of the cerebral arteries.
From the sense organs: violation of taste and smell, visual impairment (diplopia, change in color perception), tinnitus, hearing loss.
From the cardiovascular system: tachycardia, heart rhythm disturbances, lowering blood pressure.
From the hematopoietic system: leukopenia, granulocytopenia, anemia, thrombocytopenia, leukocytosis, thrombocytosis, hemolytic anemia.
From the laboratory indicators: hypoprothrombinemia, increased activity of "liver" transaminases and alkaline phosphatase, lactate dehydrogenase, increased urea concentration, hypercreatininemia, hyperbilirubinemia, hyperglycemia.
From the urinary system: hematuria, crystalluria (especially in alkaline urine and low diuresis), glomerulonephritis, dysuria, polyuria, urinary retention, albuminuria, urethral bleeding, decreased renal nitrogen function, interstitial nephritis.
Allergic reactions: itching, urticaria, the formation of blisters accompanied by bleeding, and the appearance of small nodules forming scabs, drug fever, pinpoint hemorrhages on the skin (petechiae), swelling of the face or larynx, dyspnea, eosinophilia,increased photosensitivity, vasculitis, nodal erythema, multiforme exudative erythema (including Stevens-Johnson syndrome), toxic epidermal necrolysis (Lyell's syndrome).
Other: arthralgia, arthritis, tendovaginitis, tendon ruptures, asthenia, myalgia, superinfections (candidiasis, pseudomembranous colitis), "tides" of blood to the face.