From the central nervous system: dizziness, headaches (usually not strong at the beginning of treatment), loss of consciousness, myasthenia gravis (often at the beginning of treatment), increased fatigue, depression, sleep disturbance, paresthesia.
From the side of the cardiovascular system: bradycardia, orthostatic hypotension, atrioventricular block II-III s, rarely - violation of peripheral circulation, progression of heart failure (in the period of increasing doses), swelling of the lower extremities, angina, marked decrease in blood pressure.
From the digestive tract: dry mouth, nausea, diarrhea or constipation, vomiting, abdominal pain, loss of appetite, increased activity of "liver" transaminases.
On the part of the hematopoiesis system: rarely - thrombocytopenia, leukopenia.
From the side of metabolism: weight gain, violation of carbohydrate metabolism. Allergic reactions: skin allergic reactions, exacerbation of psoriasis, nasal congestion.
From the respiratory system: dyspnea and bronchospasm (in predisposed patients)
Other: impaired vision, reduced tearing, flu-like syndrome, sneezing, myalgia, arthralgia, pain in the limbs, "intermittent" lameness, rarely - urination disorder, renal dysfunction.