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.
Laboratory indicators: hypoprothrombinemia, increased activity of "liver" transaminases and alkaline phosphatase, 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 that form scabs, drug fever, pinpoint hemorrhages on the skin (petechiae), edema of the face or larynx, dyspnea, eosinophilia, vasculitis, erythema nodosum, multiforme exudative erythema Stevens-Johnson syndrome), toxic epidermal necrolysis (Lyell's syndrome).
From the musculoskeletal system: arthralgia, arthritis, tendovaginitis, tendon ruptures, myalgia.
Other: asthenia, increased photosensitivity, superinfection (candidiasis, pseudomembranous colitis), "tides" of blood to the face.