From the gastrointestinal tract:
more often 1% - abdominal pain, sensation of bloating, diarrhea, nausea, constipation, flatulence, increased level of "liver" enzymes, peptic ulcer with possible complications (bleeding, perforation), gastrointestinal bleeding; vomiting, jaundice, melena, the appearance of blood in the stool, the defeat of the esophagus, aphthous stomatitis, dryness of the mucous membranes (including the mouth), hepatitis (possibly lightning), liver necrosis, cirrhosis, hepatorenal syndrome, changes in appetite - Anorexia, pancreatitis, cholecystopancreatitis, colitis;
very rarely - glossitis, diaphragm-like intestinal textures (nonspecific hemorrhagic colitis, exacerbation of ulcerative colitis or Crohn's disease).
From the central nervous system:
more often 1% - headache, dizziness;
less than 1% - sleep disturbance, drowsiness, depression, irritability, aseptic meningitis (usually in patients with systemic lupus erythematosus and other systemic connective tissue diseases), convulsions, general weakness, disorientation, nightmares, fear;
very rarely - a violation of sensitivity, incl. paresthesia, memory disorders, tremors, anxiety, cerebrovascular disorders, mental disorders.
From the cardiovascular system:
less than 1% - increased blood pressure; congestive heart failure,
extrasystole, chest pain;
very rarely - palpitations, myocardial infarction.
From the hemopoietic system and the immune system:
less than 1% - anemia (including hemolytic and aplastic anemia), leukopenia, thrombocytopenia, eosinophilia, agranulocytosis, thrombocytopenic purpura, worsening of the course of infectious processes (including the development of necrotizing fasciitis).
From the respiratory system:
less than 1% - cough, bronchospasm, laryngeal edema, pneumonitis.
From the urinary system:
more often 1% - fluid retention;
less than 1% - nephrotic syndrome, proteinuria, oliguria, hematuria, interstitial nephritis, papillary necrosis, acute renal failure, azotemia.
Sense organs: more often 1% - noise in the ears;
less than 1% - blurred vision, diplopia, a taste disorder, reversible or irreversible hearing loss, scotoma.
Skin:
more often 1% - skin itch, skin rash;
less often 1% - alopecia, urticaria, eczema, toxic dermatitis, multi-form exudative erythema (including Stevens-Johnson syndrome), toxic epidermal necrolysis (Lyell's syndrome), increased photosensitivity, small-spot hemorrhages.
Allergic reactions:
less often 1% - anaphylactoid reactions, anaphylactic shock (usually develops rapidly), swelling of the lips and tongue, allergic vasculitis.