From the nervous system: headache, dizziness, sleep disorders, anxiety, depression.
From the cardiovascular system: tachycardia, increased blood pressure pressure, heart failure.
On the part of the respiratory system: dyspnea, bronchospasm.
On the part of the gastrointestinal tract: abdominal pain, nausea, vomiting, heartburn, decreased appetite, diarrhea or constipation, flatulence, ulceration of the gingival mucosa, aphthous stomatitis, pancreatitis.
Organs of senses: hearing impairment, ringing or tinnitus, visual impairment, blurred vision or diplopia, dryness and irritation of the eyes.
From the urinary system: acute renal failure, nephrotic syndrome, polyuria, cystitis.
Allergic reactions: skin rash, skin itch, allergic rhinitis, angioedema, multi-form exudative erythema (including Stevens-Johnson syndrome), toxic epidermal necrolysis (Lyell's syndrome). On the part of the organs of hematopoiesis: anemia, thrombocytopenia, thrombocytopenic purpura, agranulocytosis, leukopenia, eosinophilia.
With prolonged use in large doses - hepatotoxic and nephrotoxic (hepatitis, interstitial nephritis and papillary necrosis) action; hemolytic anemia, aplastic anemia, methemoglobinemia, pancytopenia.