Allergic reactions: hives, hyperemia of the skin, erythema, angioedema, rhinitis, conjunctivitis; rarely - fever, joint pain, eosinophilia, exfoliative dermatitis, polymeric exudative erythema, Stevens-Johnson syndrome; reactions similar to serum sickness; in isolated cases - anaphylactic shock.
From the gastrointestinal tract: dysbacteriosis, taste change, vomiting,nausea, diarrhea, stomatitis, glossitis, hepatic dysfunction, a moderate increase in activity of "liver" transaminases, pseudomembranous enterocolitis.
From the nervous system: agitation, anxiety, insomnia, ataxia, confusion, behavior change, depression, peripheral neuropathy, headache, dizziness, convulsive reactions.
Laboratory indicators: leukopenia, neutropenia, thrombocytopenic purpura, anemia.
Other: shortness of breath, tachycardia, interstitial nephritis, vaginal candidiasis, superinfection (especially in patients with chronic diseases or reduced resistance of the body).