Allergic reactions: urticaria, angioedema, Stevens-Johnson syndrome, toxic epidermal necrolysis, exanthema,anaphylactic and anaphylactoid reactions. On the part of the organs of hematopoiesis: neutropenia.
On the part of the digestive system: nausea, vomiting; abdominal pain, diarrhea, increased activity of "liver" transaminases, alkaline phosphatase, hepatitis (when used in high doses for a long time).
From the nervous system: dizziness, headache, drowsiness, convulsions.
From the urinary system: hyperkreatininemia, glomerulonephritis (when used in high doses for a long time).
Deviations in the results of laboratory studies: leukopenia, anemia, eosinophilia (when used in high doses for a long time).
Other: loss of hair (when used in high doses for a long time).