Allergic reactions: a rash, redness of the skin, itching, hives, dermatitis, angioedema.
From the digestive system: irritation of the mucous membrane of the gastrointestinal tract, nausea, pain in the stomach, dry mouth, with prolonged use in large doses - erosive and ulcerative lesions of the digestive tract, vomiting, diarrhea, hyperacid gastritis, bleeding in the gastrointestinal tract, impaired liver function.
From the urinary system: dysuria, with prolonged use in large doses, there may be violations of the kidneys - hyperoxaluria (excessive excretion of urine in oxalic acid salts), nephrolithiasis (urolithiasis), damage to the glomerular apparatus, papillary necrosis.
From the sense organs: disruption of accommodation (the ability of the eye to adapt to different distances), increased intraocular pressure.
From the cardiovascular system: tachycardia (an increase in heart rate), with prolonged use in large doses - a decrease in the permeability of capillaries (possibly worsening tissue trophism, increased blood pressure and clotting, development of microangiopathies).
From the central nervous system: drowsiness, a decrease in the rate of psychomotor reactions, in the elderly, confusion or excitement is possible, with prolonged intake of a dose of more than 5 packets - headache, increased excitability, insomnia.
On the part of the hematopoiesis system: with prolonged use in large doses - anemia, methemoglobinemia (accompanied by weakness, shortness of breath with physical exertion, headaches, dizziness, palpitations), thrombocytopenia (decrease in platelet count in the blood, which can cause nasal bleeding, gum bleeding). In such cases, stop taking the drug immediately and consult a doctor.
Laboratory indicators: hyperprothrombinemia, erythropenia, neutrophilic leukocytosis, hypokalemia, glucosuria.
Other: oppression of the function of the insulin pancreas apparatus, manifested in glucosuria, hyperglycemia (high blood glucose, accompanied by excessive thirst, frequent urination, weight loss, fatigue). If any of the side effects listed in the manual are aggravated, if you notice any other side effects not listed in the instructions, tell your doctor.