From the central nervous system (CNS): increased fatigue, drowsiness, headache, dizziness, tremor, sedative affect, weakness, fatigue, inhibition, impaired coordination of movements; in rare cases, especially in children, there is a stimulating effect on the central nervous system, anxiety, increased irritability, agitation, nervousness, insomnia, hysteria, euphoria, convulsions, paresthesia, neuritis.
From the gastrointestinal tract: dyspepsia, nausea, epigastric pain, constipation, vomiting, dry mouth, decreased appetite, diarrhea.
From the urinary system: rapid or difficult urination.
On the part of the respiratory system: condensation of bronchial secretion and difficulty in sputum discharge, sensation of pressure in the chest and difficulty breathing, nasal congestion.
From the side of the cardiovascular system: lowering blood pressure (more often in elderly patients), palpitation, extrasystole.
From the sense organs: violation of the clarity of visual perception, diplopia, acute labyrinthitis, tinnitus.
From the hematopoiesis: hemolytic anemia, thrombocytopenia, agranulocytosis.
Allergic reactions: urticaria, skin rashes, photosensitivity, bronchospasm, dyspnea, anaphylactic shock.