From the gastrointestinal tract: nausea, vomiting, diarrhea, epigastric pain. abdominal pain, glossitis, stomatitis, transient hyperbilirubinemia, impaired liver function, including increased activity of "hepatic" transaminases, jaundice, pruritus anus; with prolonged use - candidiasis of the gastrointestinal tract, colitis, including pseudomembranous colitis.
On the part of the organs of hematopoiesis: reversible leukopenia, neutropenia, thrombocytopenic purpura, agranulocytosis, aplastic anemia, pancytopenia.
Allergic reactions: urticaria, angioedema, anaphylactic shock, serum sickness.
From the skin: rash, exfoliative or vesicle-bullous dermatitis, erythema multiforme (including Stevens-Johnson syndrome).
From the genitourinary system: fungal infections of the genital tract, impaired renal function (azotemia, oliguria, proteinuria).
Other: noise in the ears, vertigo.