From the gastrointestinal tract: gastralegia, anorexia, nausea, vomiting, diarrhea, flatulence, abdominal pain, increased activity of "hepatic" transaminases, hyperbilirubinemia, cholestatic jaundice, pseudomembranous enterocolitis.
From the nervous system: decreased reaction rate, headache, dizziness, sleep disturbance, general weakness; in some cases - uncertainty of movements, tremor, muscle cramps, numbness and paresthesia in the limbs, "nightmarish" dreams, psychotic reactions, anxiety, arousal, fear, depression, confusion, visual and auditory hallucinations, impaired coordination, increased intracranial pressure .
From the musculoskeletal system: tendonitis, myalgia, arthralgia,
tendosynovitis, tendon rupture.
From the sense organs: diplopia, violation of color perception, violation of taste, smell, hearing.
From the cardiovascular system: tachycardia, lowering blood pressure.
Allergic reactions: skin rash, itching, urticaria, angioedema, allergic nephritis, allergic pneumonitis, eosinophilia, bronchospasm, weakness, anaphylactic shock, multiforme exudative erythema (Stevens-Johnson syndrome), toxic epidermal necrolysis (Leyella's syndrome), purpura, fever.
From the skin: spot hemorrhages (petechiae), dermatitis bullous hemorrhagic,papular rash with a cortex, indicating the defeat of blood vessels (vasculitis).
On the part of the hematopoiesis system: leukopenia, agranulocytosis, thrombocytopenia, pancytopenia, hemolytic and aplastic anemia.
From the urinary system: acute interstitial nephritis, impaired renal function, hypercreatininemia, increased urea levels.
Other: dysbacteriosis, superinfection, hypoglycemia (in patients with diabetes mellitus), photosensitivity, vaginitis.