From the nervous system: headache, dizziness, excessive fatigue, drowsiness, mood changes, convulsions; rarely - loss of consciousness, hypoesthesia, paresthesia, tremor, asthenia, malaise, insomnia, nervousness, depression, unusual dreams, anxiety; very rarely - ataxia, apathy, agitation, amnesia.
From the digestive system: nausea, abdominal pain; rarely hyperbilirubinemia, jaundice, increased activity of "liver" transaminases, dry mouth, anorexia, vomiting, constipation or diarrhea, dyspepsia, flatulence, gingival hyperplasia; very rarely - gastritis, increased appetite, pancreatitis.
From the cardiovascular system: heart palpitations, edema of the ankles and feet, shortness of breath, blood flushes to the face, rarely - rhythm disturbances (bradycardia, ventricular tachycardia, atrial flutter), chest pain, excessive blood pressure lowering, orthostatic hypotension; very rarely - the development or aggravation of heart failure, extrasystole, migraine.
From the genitourinary system: rarely - pollakiuria, painful urge to urinate, nocturia, violation of sexual function (including decreased potency); very rarely - dysuria, polyuria.
From the musculoskeletal system: rarely - arthralgia, arthrosis, myalgia (with prolonged use); very rarely - myasthenia gravis.
From the skin: very rarely - xeroderma, alopecia, dermatitis, purpura. Allergic reactions: skin itch, rash (including erythematous, maculopapular rash, urticaria).
Other: rarely - visual impairment, conjunctivitis, diplopia, eye pain, accommodation disorder, xerophthalmia, ringing in the ears, gynecomastia, back pain, fever, chills, weight gain, dyspnoea, epistaxis, increased sweating, thirst; very rarely - cold sticky sweat, cough, rhinitis, parosmia, taste perversion, hyperglycemia.