According to the World Health Organization (WHO), undesirable effects are classified according to their frequency of development as follows: very often (≥ 1/10), often (≥1/100, <1/10), infrequently (≥1/1000, <1/100), rarely (≥1/10000, <1/1000), very rarely (<1/10000), the frequency is unknown (the frequency of occurrence of phenomena can not be determined on the basis of available data).
Violations of the blood and lymphatic system
infrequently: thrombocytopenia, leukopenia, eosinophilia;
rarely: neutropenia, including severe neutropenia;
very rarely: thrombotic thrombocytopenic purpura (see section "Special instructions"), aplastic anemia, pancytopenia, agranulocytosis, severe thrombocytopenia, granulocytopenia, anemia, acquired hemophilia A.
Immune system disorders
very rarely: serum sickness, anaphylactoid reactions, cross allergic or hematological reactions hypersensitivity to drugs of the thienopyridine group (ticlopidine, prasugrel) (see section "Special instructions").
Disorders of the psyche
very rarely: hallucinations, confusion of consciousness.
Disturbances from the nervous system
infrequently: intracranial hemorrhage (several reported fatal cases), headache, paresthesia, dizziness;
very rarely: a violation of taste perception.
Disturbances on the part of the organ of sight
infrequently: ocular hemorrhage (conjunctival, in the tissue and retina of the eye).
Hearing disorders and labyrinthine disorders
rarely: vertigo.
Vascular disorders
often: hematoma; very rarely: serious bleeding, bleeding from the operating wound, vasculitis, lowering of arterial pressure.
Disturbances from the respiratory system, chest and mediastinal organs
often: epistaxis; very rarely: bleeding from respiratory tract (hemoptysis, pulmonary hemorrhage), bronchospasm, interstitial pneumonia, eosinophilic pneumonia.
Disorders from the gastrointestinal tract
often: gastrointestinal bleeding, diarrhea, abdominal pain, dyspepsia;
infrequently: a stomach ulcer and duodenal ulcers, gastritis, Vomiting, nausea, constipation, bloating abdomen;
rarely: retroperitoneal hemorrhage;
very rarely: gastrointestinal bleeding and retroperitoneal hemorrhage with fatal outcome, pancreatitis, colitis (including ulcerative colitis or lymphocytic colitis), stomatitis.
Disturbances from the liver and bile ducts
very rarely: acute hepatic insufficiency, hepatitis, deviation from the norm of indicators of liver function.
Disturbances from the skin and subcutaneous tissues
often: subcutaneous bruising;
infrequently: rash, itching, purpura (subcutaneous hemorrhage);
very rarely: bullous dermatitis (toxic epidermal necrolysis, Stevens-Johnson syndrome, erythema multiforme), angioedema, drug hypersensitivity syndrome, drug rash with eosinophilia and systemic manifestations (DRESS), erythematous or exfoliative rash, urticaria, eczema, flat lichen.
Disturbances from musculoskeletal and connective tissue
very rarely: hemorrhages in the muscles and joints, arthritis, arthralgia, myalgia.
Disorders from the nights and urinary tract ways
infrequently: hematuria;
very rarely: glomerulonephritis, an increase in the concentration of creatinine in the blood.
General disorders and disorders at the site of administration
often: bleeding from a place vascular puncture;
very rarely: fever.
Laboratory and instrumental data
infrequently: increase in time bleeding, reduction the number of neutrophils, decrease in the number of platelets in the peripheral blood.