The incidence of side effects is classified according to recommendations - the World Health Organization: very often - at least 10%; often - not, less than 1%, but less than 10%; infrequently - not less than 0,1%,but less than 1%; rarely - not less than 0.01%, but less than 0.1%; very rarely - less than 0.01%, including isolated cases!
From the nervous system: very often - headache ;, often, - dizziness; infrequently - drowsiness, hypoesthesia; rarely - a stroke, a faint; frequency unknown - transient ischemic attack, convulsions, c. including recurrent.
From the cardiovascular system: often - "hot flashes"; infrequent - a feeling of palpitations, tachycardia; rarely - increase or decrease in blood pressure, myocardial infarction, atrial fibrillation; frequency; unknown - ventricular arrhythmia, unstable angina, sudden death. , From the side of the organ of vision: often - visual impairment, violation of color perception; * infrequent - conjunctival damage, lacrimation, increased perception of light, impaired vision, transient chromatopsy; rarely reddening of the scleral in the eyes of apples; frequency unknown - anterior ischemic optic neuropathy, retinal vascular occlusion, narrowing of the visual fields.
From the side of the organ of hearing: infrequently - vertigo, noise in the ears; rare, deaf
On the part of the respiratory system: - often - nasal congestion; rarely - nasal - d bleeding. .
From the gastrointestinal tract: often - dyspepsia; infrequently - vomiting, nausea, dryness of the oral mucosa.
Allergic reactions: infrequent - skin rash; frequency unknown - Stevens-Johnson syndrome, toxic epidermal necrolysis (Lyell's syndrome).
On the part of the genitals: the frequency is unknown - priapism, prolonged erection. .
Other: rarely - chest pain, fatigue.