The following side effects are classified by organs and systems and by frequency. Side effects are classified in frequency as follows: very often (≥ 1/10), often (≥ 1/100 and <1/10), infrequently (≥ 1/1000 and <1/100), rarely (≥ 1/10000 and <1/1000), very rarely (<1/10000), with an unknown frequency (based on existing data, it is impossible to make an estimate).
Infections: infrequently - Cystitis.
Disorders from the immune system: very rarely - severe skin reactions, multi-form exudative erythema, Stevens-Johnson syndrome.
Disorders from the metabolism and nutrition: rarely - increase in body weight.
Mental disorders: often - excitement, irritability, insomnia, anxiety.
Disorders from the nervous system: infrequently - dizziness, headache; rarely - sedative effect (relaxation, slowing of reaction); rarely - convulsions.
Disorders from the gastrointestinal tract: infrequently - dry mouth, nausea, vomiting, diarrhea.
Hepatobiliary disorders: very rare - increased activity of hepatic enzymes, hepatitis.
At the beginning of treatment, dry mouth and dizziness may appear, but they usually go away spontaneously during treatment. In rare cases, there are symptoms of central nervous system stimulation, such as irritation, irritability, insomnia and anxiety, especially in children, nervousness, fatigue, drowsiness.