Frequency of occurrence of side effects (number of cases / number of observations): very often (≥ 1/10); often (≥ 1/100 to <1/10); infrequently (≥ 1/1000 to <1/100); rarely (≥ 1/10000 to <1/1000); very rarely (<1/10 000).
From the nervous system: infrequently - dizziness, headache, insomnia, anxiety, confusion; rarely - migraine, hallucinations, sweating, paresthesia, anxiety, nightmares, depression, tremors, convulsions, hypesthesia; very rarely - hyperesthesia, psychosis, pronounced seizures, increased muscle tone, increased intracranial pressure, ataxia.
From the digestive system: often - nausea, diarrhea; infrequently - vomiting, abdominal pain, flatulence, dyspepsia, anorexia; rarely - candidiasis of the oral cavity, jaundice, including cholestatic, pseudomembranous colitis; very rarely - candidiasis, hepatitis, necrosis of liver tissue (in extremely rare cases progressing to life-threatening liver failure), life-threatening pseudomembranous colitis with possible fatal outcome, pancreatitis.
From the cardiovascular system: rarely - tachycardia, a sensation of "tide" of blood to the face, hypotension, fainting; very rarely - vasculitis, exacerbation of myasthenia gravis symptoms.
On the part of the respiratory system: rarely - dyspnoea, swelling of the larynx.
From the sense organs: infrequently - a taste disorder; rarely - noise in the ears, temporary hearing impairment, visual impairment (diplopia, color perception disorder); very rarely - parosmia, anosmia.
From the hematopoietic system: infrequently - eosinophilia; rarely - leukopenia, anemia, leukocytosis, increase or decrease in the level of prothrombin, thrombocytopenia, thrombocytosis; very rarely - hemolytic anemia, pancytopenia (including life-threatening), agranulocytosis, in extremely rare cases, life-threatening bone marrow depression.
From the urinary system: infrequently - increased levels of creatinine and urea nitrogen; rarely - acute renal failure, vaginal candidiasis, hematuria, crystalluria, interstitial nephritis.
From the musculoskeletal system: infrequently - arthralgia; rarely - myalgia, swelling of the joints; very rarely - tendonitis (predominantly Achilles tendons), partial or complete rupture of tendons (mainly Achilles), exacerbation of myasthenia gravis symptoms.
From the skin: infrequently - a rash, itching, hives; rarely photosensitivity reactions; very rarely - point hemorrhages on the skin (petechiae), multiform erythema, nodular erythema,Stevens-Johnson syndrome (malignant exudative erythema), Lyell's syndrome (toxic epidermal necrolysis), persistent rashes on the skin.
Allergic reactions: rarely - edema, angioedema; very rarely - skin rash, similar to serum sickness, anaphylactic shock.
From the laboratory indicators: infrequently - increased activity of "hepatic" transaminases (alanine aminotransferase, aspartate aminotransferase), alkaline phosphatase, hyperbilirubinemia; rarely - hyperglycemia; very rarely - increased activity of amylase, lipase.
Other: rarely - pain in the back, in the chest, peripheral edema.