The drug is well tolerated at recommended doses.
In single cases there are:
from the central nervous system: headache, fatigue;
from the digestive tract: nausea, pain in the epigastric region;
from the endocrine system: hypoglycemia (up to the development of coma);
from the hematopoiesis: anemia, hemolytic anemia (especially for patients with deficiency of glucose-6-phosphate dehydrogenase); extremely rare - thrombocytopenia;
allergic reactions: skin rash, itching, urticaria, angioedema;
other: hypervitaminosis, metabolic disorders, sensation of heat, dry mouth, paresis of accommodation, urinary retention, drowsiness.
All side effects of the drug should be reported to the doctor.